Teledyne CCT-49K840-T Latching multi-throw coaxial switch Datasheet

Series CCT-49K/CT-49K
Internal 50Ω Termination DC-40 GHz
Latching Multi-Throw Coaxial Switch
COAX SWITCHES
PART NUMBER
DESCRIPTION
CCT-49K
Commercial Latching Multi-throw, DC-40 GHz
CT-49K
Elite Latching Multi-throw, DC-40GHz
The CCT-49K/CT-49K is an Internally Terminated broadband, multi-throw, electromechanical coaxial
switch designed to switch a microwave signal from a common input to any of 3, 4, 5, or 6 outputs.
The characteristic impedance is 50 Ohms. Internal terminations provide an impedence match for the
unselected ports. The switches are small using the popular connector spacing on a 1.062” dia. circle.
Each position has an individual actuator mechanism allowing random position selection. This also
minimizes switching time.
The CCT-49K/CT-49K comes with a latching actuator. The latching switch remains in the last position
selected when the switch is de-energized. STD dual command requires a reset pulse before a new
selected position. A separate reset circuit allows all positions to be set to an open position. User must
provide both reset (clear) and set (select new position) commands.
Available with
USB & Ethernet
Control!
Click here
MMC SERIES
ENVIRONMENTAL AND PHYSICAL CHARACTERISTICS
ELECTRICAL CHARACTERISTICS
Operating Temperature
Commercial Model, CCT-49K
Elite Model, CT-49K
Form Factor
–40°C to 65°C
–55°C to 85°C
Multi-Throw,
break before make
Vibration (MIL-STD-202 Method 214,
Condition D, non-operating)
10 g’s RMS
Frequency Range
CCT-49K
CT-49K
DC–40 GHz
DC–40 GHz
Shock (MIL-STD-202 Method 213,
Condition D, non-operating)
500 g’s
Characteristic Impedance
50 Ohms
Operate Time
20 ms (max.)
Standard Actuator Life
Actuator Life w/ Additional Features
5,000,000 cycles
1,000,000 cycles
Terminations
50Ω
Connector Type
2.92mm (K)
Humidity (Moisture Seal)
Available
Weight
6 oz. (170.1g) (max.)
Actuation Voltage Available
12
Actuation Current
15
24
255 205 130
Reset Current (# of Positions)
28 V
90 mA
3
765 615 390 270 mA
4
1020 820 520 360 mA
5
1275 1025 650 450 mA
6
1530 1230 780 540 mA
PERFORMANCE CHARACTERISTICS
Frequency
DC–12 GHz
12–18 GHz
18–28 GHz
28–36 GHz
36–40 GHz
0.2
0.4
0.5
1.0
1.4
Insertion Loss, dB,
max.
Isolation, dB, min.
VSWR , max.
75
70
70
60
60
1.25:1
1.50:1
1.5:1
1.80:1
2.10:1
For maximum limits, please see charts on pages 6-8
PART NUMBERING SYSTEM
CCT-49
K
6
6
C
-
T **
Series
Options
Connectors
Actuator Type
Actuator Voltage
Number of Positions
CONNECTOR
ACTUATOR VOLTAGE
NUMBER OF POSITIONS
ACTUATOR TYPE
OPTIONS
K: 2.92mm FEMALE
6: 28 VDC LATCHING
3: SP3T
0: NO INDICATOR CONTACTS
T: TTL DRIVERS WITH DIODES
7: 15 VDC LATCHING
4: SP4T
C: INDICATOR CONTACTS
D: COIL TRANSIENT SUPPRESSION DIODES
8: 12 VDC LATCHING
5: SP5T
D: SELF CUTOFF ONLY
R: POSITIVE
9: 24 VDC LATCHING
6: SP6T
+ COMMON
TD: DECODERS AND TTL DRIVERS WITH
DIODES
**SEE PARTS LIST ON PAGE
11-13
M: MOISTURE SEAL
S: D-SUB CONNECTOR*
For additional options, please contact factory.
© 2016 TELEDYNE RELAYS
(800) 284-7007 • www.teledynecoax.com
* D-Sub Connector may be 9 or 15 pin depending on
number of throws. (See Connector Pinout page)
CCT-49K/CT-49K Page 1
CCT-49K\CT-49K\072016Q3
Series CCT-49K/CT-49K
Internal 50Ω Termination DC-40 GHz
Latching Multi-Throw Coaxial Switch
COAX SWITCHES
SCHEMATICS AND MECHANICAL OUTLINE
TTL
Indicators
Indicators (Positive Common)
Analog
14X SOLDER TERMINALS
SOLDER WIRE MAXIMUM
TEMP 250ºC FOR NO
MORE THAN 5 SEC
SP3T
SP5T
SP6T
SP4T
H = 2.25 STD & Indicator Models
H = 2.50 All OTHER Models
“-S OPTION” 9-PIN, 15-PIN, 26-PIN D-SUB CONNECTOR (EXAMPLE:
CCT-49K/CT-49K Page 2
CCT-49KS660-S)
SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE
© 2016 TELEDYNE COAX SWITCHES
CCT-49K\CT-49K\072016\Q3
Series CCT-49K/CT-49K
Internal 50Ω Termination DC-40 GHz
Latching Multi-Throw Coaxial Switch
COAX SWITCHES
CONNECTOR PINOUT FOR LATCHING SP3T MULTI-THROW SWITCHES
CT-49K630-S
EXAMPLE
INDICATOR
CT49K63C-S
CT49K630-TS
YES
TTL
CT49K63C-TS
YES
YES
DECODERS & TTL
PIN NO.
CT49K630-TDS
YES
CT49K63C-TDS
YES
YES
YES
9-PIN
15-PIN
9-PIN
15-PIN
9-PIN
15-PIN
1
PORT 1
PORT 1
TTL 1
TTL 1
LOGIC 1
LOGIC 1
2
PORT 2
PORT 2
TTL 2
TTL 2
LOGIC 2
LOGIC 2
3
PORT 3
PORT 3
TTL 3
TTL 3
LOGIC 3
LOGIC 3
9-PIN D-SUB CONNECTOR
4
1
5
6
9
7
COMMON
COMMON
COMMON
COMMON
8
RESET
RESET
RESET
RESET
9
VSW
VSW
COMMON
VSW
COMMON
VSW
10
D INDICATOR (COM)
D INDICATOR (COM)
D INDICATOR (COM)
11
E INDICATOR
E INDICATOR
E INDICATOR
12
F INDICATOR
F INDICATOR
F INDICATOR
13
G INDICATOR
G INDICATOR
G INDICATOR
15-PIN D-SUB CONNECTOR
14
15
CONNECTOR PINOUT FOR LATCHING SP4T MULTI-THROW SWITCHES
CT-49K640-S
EXAMPLE
INDICATOR
CT49K64C-S
CT49K640-TS
YES
TTL
CT49K64C-TS
YES
YES
DECODERS & TTL
PIN NO.
CT49K640-TDS
YES
CT49K64C-TDS
YES
YES
YES
9-PIN
15-PIN
9-PIN
15-PIN
9-PIN
15-PIN
1
PORT 1
PORT 1
TTL 1
TTL 1
LOGIC 1
LOGIC 1
2
PORT 2
PORT 2
TTL 2
TTL 2
LOGIC 2
LOGIC 2
3
PORT 3
PORT 3
TTL 3
TTL 3
LOGIC 3
LOGIC 3
4
PORT 4
PORT 4
TTL 4
TTL 4
7
COMMON
COMMON
COMMON
COMMON
COMMON
COMMON
8
RESET
RESET
RESET
RESET
5
6
9
VSW
10
D INDICATOR (COM)
11
VSW
VSW
D INDICATOR (COM)
E INDICATOR
VSW
D INDICATOR (COM)
E INDICATOR
E INDICATOR
12
F INDICATOR
F INDICATOR
F INDICATOR
13
G INDICATOR
G INDICATOR
G INDICATOR
14
H INDICATOR
H INDICATOR
H INDICATOR
15
CONNECTOR PINOUT FOR LATCHING SP5T MULTI-THROW SWITCHES
CT-49K650-S
EXAMPLE
INDICATOR
CT49K65C-S
CT49K650-TS
YES
TTL
CT49K65C-TS
YES
YES
DECODERS & TTL
PIN NO.
CT49K650-TDS
YES
CT49K65C-TDS
YES
YES
YES
9-PIN
15-PIN
9-PIN
15-PIN
9-PIN
15-PIN
1
PORT 1
PORT 1
TTL 1
TTL 1
LOGIC 1
LOGIC 1
2
PORT 2
PORT 2
TTL 2
TTL 2
LOGIC 2
LOGIC 2
3
PORT 3
PORT 3
TTL 3
TTL 3
LOGIC 3
LOGIC 3
4
PORT 4
PORT 4
TTL 4
TTL 4
5
PORT 5
PORT 5
TTL 5
TTL 5
7
COMMON
COMMON
COMMON
COMMON
COMMON
COMMON
8
RESET
RESET
RESET
RESET
6
9
10
11
VSW
D INDICATOR (COM)
E INDICATOR
VSW
D INDICATOR (COM)
E INDICATOR
VSW
VSW
D INDICATOR (COM)
E INDICATOR
12
F INDICATOR
F INDICATOR
F INDICATOR
13
G INDICATOR
G INDICATOR
G INDICATOR
14
H INDICATOR
H INDICATOR
H INDICATOR
15
K INDICATOR
K INDICATOR
K INDICATOR
© 2016 TELEDYNE RELAYS
(800) 284-7007 • www.teledynecoax.com
CCT-49K/CT-49K Page 3
CCT-49K\CT-49K\072016Q3
Series CCT-49K/CT-49K
Internal 50Ω Termination DC-40 GHz
Latching Multi-Throw Coaxial Switch
COAX SWITCHES
CONNECTOR PINOUT FOR LATCHING SP6T MULTI-THROW SWITCHES
CT-49K660-S
EXAMPLE
INDICATOR
CT49K66C-S
CT49K660-TS
YES
TTL
CT49K66C-TS
YES
CT49K66C-TDS
YES
1
YES
DECODERS & TTL
PIN NO.
CT49K660-TDS
YES
YES
YES
9-PIN
15-PIN
9-PIN
15-PIN
9-PIN
15-PIN
1
PORT 1
PORT 1
TTL 1
TTL 1
LOGIC 1
LOGIC 1
2
PORT 2
PORT 2
TTL 2
TTL 2
LOGIC 2
LOGIC 2
3
PORT 3
PORT 3
TTL 3
TTL 3
LOGIC 3
LOGIC 3
4
PORT 4
PORT 4
TTL 4
TTL 4
5
PORT 5
PORT 5
TTL 5
TTL 5
6
PORT 6
PORT 6
TTL 6
TTL 6
7
COMMON
COMMON
COMMON
COMMON
8
RESET
RESET
RESET
RESET
VSW
VSW
15-PIN D-SUB CONNECTOR
VSW
COMMON
COMMON
VSW
D INDICATOR (COM)
9
D INDICATOR (COM)
10
E INDICATOR
11
F INDICATOR
F INDICATOR
12
G INDICATOR
G INDICATOR
13
H INDICATOR
H INDICATOR
14
K INDICATOR
15
L INDICATOR
16
9
E INDICATOR
26-PIN D-SUB CONNECTOR
K INDICATOR
D INDICATOR (COM)
L INDICATOR
E INDICATOR
17
F INDICATOR
18
G INDICATOR
19
H INDICATOR
20
K INDICATOR
21
L INDICATOR
22
23
24
25
26
CCT-49K/CT-49K Page 4
SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE
© 2016 TELEDYNE COAX SWITCHES
CCT-49K\CT-49K\072016\Q3
Series CCT-49K/CT-49K
Internal 50Ω Termination DC-40 GHz
Latching Multi-Throw Coaxial Switch
COAX SWITCHES
TRUTH TABLE Latching
CCT-49KX3C-T
Logic
Input
RF Path
1
2
3
R
1
0
0
0
1
0
0
0
1
Indicator
Switches
J1
J2
J3
Reset
E
0
On
Off
0
Off
On
0
Off
Off
On
F
G
Off
Off
Off
Off
C
0
0
0
C
0
Off
0
0
C
TRUTH TABLE Latching
CCT-49KX3C-TD
Logic
Input
RF Path
Indicator
Switches
1
2
3
J1
J2
J3
Reset
E
F
G
0
0
0
On
Off
Off
Off
C
0
0
1
0
0
Off
On
Off
Off
0
C
0
0
1
0
Off
Off
On
Off
0
0
C
0
1
1
Off
Off
Off
Reset
0
0
0
1
1
1
0
0
0
COIL OFF
TRUTH TABLE Latching
CCT-49KX4C-T
Logic Input
1
2
RF Path
3
4
R
J1
J2
Indicator
Switches
J3
J4
Reset
E
F
G
H
1
0
0
0
0
On
Off
Off
Off
Off
C
0
0
0
0
1
0
0
0
Off
On
Off
Off
Off
0
C
0
0
0
0
1
0
0
Off
Off
On
Off
Off
0
0
C
0
0
0
0
1
0
Off
Off
Off
On
Off
0
0
0
C
TRUTH TABLE Latching
CCT-49KX4C-TD
Logic Input
RF Path
Indicator
Switches
1
2
3
J1
J2
J3
J4
Reset
E
F
G
H
0
0
0
On
Off
Off
Off
Off
C
0
0
0
1
0
0
Off
On
Off
Off
Off
0
C
0
0
0
1
0
Off
Off
On
Off
Off
0
0
C
0
1
1
0
Off
Off
Off
On
Off
0
0
0
C
0
1
1
Off
Off
Off
Off
Reset
1
1
1
© 2016 TELEDYNE RELAYS
COIL OFF
0
0
0
0
0
0
0
0
(800) 284-7007 • www.teledynecoax.com
CCT-49K/CT-49K Page 5
CCT-49K\CT-49K\072016Q3
Series CCT-49K/CT-49K
Internal 50Ω Termination DC-40 GHz
Latching Multi-Throw Coaxial Switch
COAX SWITCHES
TRUTH TABLE Latching
CCT-49KX5C-T
Logic Input
RF Path
Indicator Switches
1
2
3
4
5
R
J1
J2
J3
J4
J5
Reset
E
F
G
H
K
1
0
0
0
0
0
On
Off
Off
Off
Off
Off
C
0
0
0
0
0
1
0
0
0
0
Off
On
Off
Off
Off
Off
0
C
0
0
0
0
0
1
0
0
0
Off
Off
On
Off
Off
Off
0
0
C
0
0
0
0
0
1
0
0
Off
Off
Off
On
Off
Off
0
0
0
C
0
0
0
0
0
1
0
Off
Off
Off
Off
On
Off
0
0
0
0
C
TRUTH TABLE Latching
CCT-49KX5C-TD
Logic Input
RF Path
Indicator Switches
1
2
3
J1
J2
J3
J4
J5
Reset
E
F
G
H
K
0
0
0
On
Off
Off
Off
Off
Off
C
0
0
0
0
1
0
0
Off
On
Off
Off
Off
Off
0
C
0
0
0
0
1
0
Off
Off
On
Off
Off
Off
0
0
C
0
0
1
1
0
Off
Off
Off
On
Off
Off
0
0
0
C
0
0
0
1
Off
Off
Off
Off
On
Off
0
0
0
0
C
0
1
1
Off
Off
Off
Off
Off
Reset
1
1
1
COIL OFF
0
0
0
0
0
0
0
0
0
0
TRUTH TABLE Latching
CCT-49KX6C-T
Logic Input
1
2
RF Path
3
4
5
6
R
J1
J2
J3
Indicator Switches
J4
J5
J6
Reset
E
F
G
H
K
L
1
0
0
0
0
0
0
On
Off
Off
Off
Off
Off
Off
C
0
0
0
0
0
0
1
0
0
0
0
0
Off
On
Off
Off
Off
Off
Off
0
C
0
0
0
0
0
0
1
0
0
0
0
Off
Off
On
Off
Off
Off
Off
0
0
C
0
0
0
0
0
0
1
0
0
0
Off
Off
Off
On
Off
Off
Off
0
0
0
C
0
0
0
0
0
0
1
0
0
Off
Off
Off
Off
On
Off
Off
0
0
0
0
C
0
0
0
0
0
0
1
0
Off
Off
Off
Off
Off
On
Off
0
0
0
0
0
C
TRUTH TABLE Latching
CCT-49KX6C-TD
Logic Input
RF Path
Indicator Switches
1
2
3
J1
J2
J3
J4
J5
J6
Reset
E
F
G
H
K
0
0
0
On
Off
Off
Off
Off
Off
Off
C
0
0
0
0
0
1
0
0
Off
On
Off
Off
Off
Off
Off
0
C
0
0
0
0
0
1
0
Off
Off
On
Off
Off
Off
Off
0
0
C
0
0
0
1
1
0
Off
Off
Off
On
Off
Off
Off
0
0
0
C
0
0
0
0
1
Off
Off
Off
Off
On
Off
Off
0
0
0
0
C
0
1
0
1
Off
Off
Off
Off
Off
On
Off
0
0
0
0
0
C
0
1
1
Off
Off
Off
Off
Off
Off
Reset
1
1
1
CCT-49K/CT-49K Page 6
COIL OFF
L
0
0
0
0
0
0
0
0
0
0
0
0
SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE
© 2016 TELEDYNE COAX SWITCHES
CCT-49K\CT-49K\072016\Q3
Series CCT-49K/CT-49K
Internal 50Ω Termination DC-40 GHz
Latching Multi-Throw Coaxial Switch
COAX SWITCHES
TYPICAL RF PERFORMANCE CURVES
INSERTION LOSS
0
Insertion Loss (dB)
-0.2
-0.4
-0.6
-0.8
-1
-1.2
0
5
10
15
20
25
30
35
40
30
35
40
Frequency (GHz)
VSWR
2
1.9
1.8
VSWR (dB)
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1
0
5
10
15
20
25
Frequency (GHz)
© 2016 TELEDYNE RELAYS
(800) 284-7007 • www.teledynecoax.com
CCT-49K/CT-49K Page 7
CCT-49K\CT-49K\072016Q3
Series CCT-49K/CT-49K
Internal 50Ω Termination DC-40 GHz
Latching Multi-Throw Coaxial Switch
COAX SWITCHES
TYPICAL RF PERFORMANCE CURVES
ISOLATION
0
Isolation (dB)
-20
-40
-60
-80
-100
-120
0
5
10
15
20
25
30
35
40
Frequency (GHz)
CCT-49K/CT-49K Page 8
SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE
© 2016 TELEDYNE COAX SWITCHES
CCT-49K\CT-49K\072016\Q3
Series CCT-49K/CT-49K
Internal 50Ω Termination DC-40 GHz
Latching Multi-Throw Coaxial Switch
COAX SWITCHES
TYPICAL POWER PERFORMANCE CURVE
Power Handling vs. Frequency
3000
2000
SPE
CIA
Power (W)
1000
800
600
LH
IGH
STA
PO
WE
ND
AR
DN
RS
WIT
CH
ES
&T
N
S
C
400 TAN
SW
DA
ITC
R
HE
DS
300
S
MA
SW
ITC
200 ST
HES
AN
DA
RD
KS
100
WI
TCH
80
ES
60
40
30
20
10
5
.1
.2
.3 .4
.6 .8 1
2
4
6 8 10
18 26.5 40
Frequency GHz
Estimates based on the following reference conditions:
• Ambient temperature of 40°C or less
• Sea level operation
• Load VSWR of 1.20:1 maximum
• No high-power (hot) switching
Please contact Teledyne Coax Switches for derating factors when applications do not meet the foregoing reference conditions.
© 2016 TELEDYNE RELAYS
(800) 284-7007 • www.teledynecoax.com
CCT-49K/CT-49K Page 9
CCT-49K\CT-49K\072016Q3
Series CCT-49K/CT-49K
Internal 50Ω Termination DC-40 GHz
Latching Multi-Throw Coaxial Switch
GLOSSARY
Actuator
An actuator is the electromechanical mechanism that transfers the
RF contacts from one position to another upon DC command.
Arc Suppression Diode
A diode is connected in parallel with the coil. This diode limits the
“reverse EMF spike” generated when the coil de-energizes to 0.7
volts. The diode cathode is connected to the positive side of the
coil and the anode is connected to the negative side.
Date Code
All switches are marked with either a unique serial number or a
date code. Date codes are in accordance with MIL-STD-1285
Paragraph 5.2.5 and consist of four digits. The first two digits
define the year and the last two digits define the week of the year
(YYWW). Thus, 1032 identifies switches that passed through final
inspection during the 32nd week of 2010.
Indicator
Indicators tell the system which position the switch is in. Other
names for indicators are telemetry contacts or tellback circuit.
Indicators are usually a set of internally mounted DC contacts
linked to the actuator. They can be wired to digital input lines,
status lights, or interlocks. Unless otherwise specified, the
maximum indicator contact rating is 30 Vdc, 50 mA, or 1.5 Watts
into a resistive load.
Isolation
Isolation is the measure of the power level at the output connector
of an unconnected RF channel as referenced to the power at the
input connector. It is specified in dB below the input power level.
Multi-Throw Latching Switch
A multi-throw switch is a switch with one input and three or more
output ports. The CCT-49K can switch a microwave signal to any
of 2,3,4,5 or 6 output from a single common input.
DUAL PULSE SWITCHING COMMAND CHARACTERISTICS:
1. APPLIES FOR SINGLE-POLE MULTI-THROW LATCHING
SWITCH ONLY.
2. MUST APPLY RESET PULSE FIRST
(BREAK-BEFORE-MAKE).
3. RESET AND SET DEFINITIONS
RESET: OPEN ALL RF PATHS (POSITIONS).
SET: CLOSE THE SELECTED RF PATH (POSITION).
4. COMMAND PULSE TIMING:
RESET
PULSE
SET
PULSE
V
VOLTAGE PULSE
(SEE NOTE 5)
COAX SWITCHES
Switching Time
Switching time is the total interval beginning with the arrival of the
leading edge of the command pulse at the switch DC input and
ending with the completion of the switch transfer, including contact
bounce. It consists of three parts: (1) inductive delay in the coil, (2)
transfer time of the physical movement of the contacts, and (3) the
bounce time of the RF contacts.
TTL Switch Driver Option
As a special option, switch drivers can be provided for both failsafe
and latching switches, which are compatible with industry-standard
low-power Schottky TTL circuits.
TD-Option
This option includes a decoder. The 3-bit parallel command is
decoded to internally select the appropriate position. See the logic
tables. The TD-Option increases the Vsw supply current demand
by 50mA max at 28Vdc and +20°C.
Performance Parameters vs Frequency
Generally speaking, the RF performance of coaxial switches is
frequency dependent. With increasing frequency, VSWR and
insertion loss increase while isolation decreases. All data sheets
specify these three parameters as “worst case” at the highest
operating frequency. If the switch is to be used over a narrow
frequency band, better performance can be achieved.
Actuator Current vs Temperature
The resistance of the actuator coil varies as a function of
temperature. There is an inverse relationship between the
operating temperature of the switch and the actuator drive current.
For switches operating at 28 VDC, the approximate actuator drive
current at temperature, T, can be calculated using the equation:
IT =
IA
[1 + .00385 (T-20)]
Where:
IT = Actuator current at temperature, T
IA = Room temperature actuator current –
see data sheet
T = Temperature of interest in °C
O
T1
T3
T2
T1 AND T2 = 30 mSEC
MIN. T3 = 10 mSEC MIN.
I1
I2 CURRENT PULSE
(SEE NOTE 6)
ON
SWITCHING TIME
(MONITOR RF
CONTACT): T4
AND T5 = 20
mSEC MAX
OFF
T4
Magnetic Sensitivity
An electro-mechanical switch can be sensitive to ferrous materials
and external magnetic fields. Neighboring ferrous materials should
be permitted no closer than 0.5 inches and adjacent external
magnetic fields should be limited to a flux density of less than 5
Gauss.
T5
5. COMMAND SWITCHING VOLTAGE:
V = 26-32 VDC PULSE
6. SWITCHING CURRENT:
SWITCHING CURRENT
AT 28 VDC AND 20°C
NO. OF POS.
3 POS.
4 POS.
5 POS.
6 POS.
CCT-49K/CT-49K Page 10
RESET (I 1)
270 mA
360 mA
450 mA
540 mA
SET (12)
90 mA
90 mA
90 mA
90 mA
SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE
© 2016 TELEDYNE COAX SWITCHES
CCT-49K\CT-49K\072016\Q3
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