TELLEDYNE MIC CROWAVE SOLUTION NS N NF v1 Ka‐Baand (29‐31GHz) Long SSSPA (TSA A‐2141455) Summa ary This is a GaN based Hermeticallyy Sealed SSP PA which prooduces 41dB Bm minimum Linear Po ower1 (42dBm ttypical) over the entire 29‐31GHz b bandwidth aand operatin ng temperature range. W When coupled with Teledyyne’s Dual Band B BUC with w Integratted IF Linearizer it can produce 42 2dBm minimum m Linear Pow wer (43dBm m typical – se ee Figure 1). Figure 1 1. Performance e enhancemen nt gained throu ugh the use of the adaptive IF linearizer fun nction in the TSSA‐ 21414 45 BUC with If linearizer (mod dulation param meters as described in note 1). 1 When a QPSK Q signal with w a data rate of 10Msps and d a root raised cosine filter w with a roll-off faactor (α) of 0.22 is injected intto the SSPA, th he power levell at which the spectral s regrow wth 1 symbol raate offset from m the carrier (100MHz in this casee) is 30dBc relaative to the carrrier is defined as the Linear Power. Note: The input moddulated signal should hav ve a spectral reg growth of at leeast 55dBc. 1 The unit has an integrated waveguide dual directional coupler at the output enabling both the detection and reporting of the output power, as well as providing an RF feedback signal to the adaptive IF linearizer when used with the Teledyne Dual Band BUC (TSA‐214144). If the linearizer is not used, the feedback port should be terminated in 50 Ω, or it can be used to monitor the RF output of the amplifier. The reverse coupler senses reflected power from a short and self protects the unit by disabling it. Included features are 20dB gain control, true output power monitoring, high reflected power shutdown capability, internal temperature monitoring, enable/disable control, and fault indication. Most of this is done through the RS‐422 interface. The unit also includes a hard wired, TTL controlled pin for disabling the unit should the RS‐422 communications link fail. The total weight is 2.0 lbs max and the size is 6.6” L x 3.7” W x 1” H. See the outline drawing attached. The unit has a wide operating voltage of +20.5V to +32.5V. 2 Specifications Table 1: SSPA Specifications Parameter Operating Frequency Range Operating Temperature Range Small-Signal Gain Range (Controlled Via RS-422) Forward Gain Flatness (29-31GHz) Feedback Gain Flatness (29-31GHz) Gain Variation Over Temperature Gain Step Input Return Loss Feedback Return Loss Output Return Loss Spurious @ Pout = 42dBm (29-31GHz) In Band Spurious @ Pout = 42dBm (18.3-21.2GHz) Receive Band Noise Power Density (29-31GHz) In Band @ Maximum Gain Linear Power (see def. on pg. 1) Power at Feedback Port @ POUT=42dBm Detected Power Accuracy (Read Via RS-422) Max RF Input Power Reflected Power when Unit Shuts Down RF Enable/Disable Time Via RS422 Via Pin 10 DC Power (RF disabled) DC Power (RF enabled, POUT=42dBm)) DC Voltage Range RF Input Connector RF Feedback Connector RF Output Interface DC Supply/Command/Monitor Interface Size Weight Value 29 to 31 GHz -55 to +70 ˚C 35 dB to 55 dB 2 dBpk-pk max 2 dBpk-pk max 3 dBpk-pk max 0.1dB steps 14dB min 12dB min 12dB min -60dBc -60dBc -90dBm/Hz max 41dBm min (42dBm min w/ Adaptive IF Linearizer) -15dBm typ.2 ±0.75dB typ +13dBm 36 to 37dBm typ. 1ms typ. 100µs max 3W max 125W max +20.5 to +32.5V 2.92mm (female) 2.92mm (female) WR-28 Cover Flange with O-Ring Groove 25 pin Micro-D Connector (MIL-DTL-83513/2) 6.6” L x 3.7” W x 1” H 2 lbs max Micro D Connector Pinout Descriptions 2 Can be specified differently depending upon length of cable used from SSPA to BUC. 3 The Micrro D Connecttor on the SSSPA consistss of 25 pins w with the pino outs as desccribed by Tab ble 2. Tie all +V VDC pins to ogether. Sim milarly tie all GND (grouund) pins to ogether. Thee RS‐422 GN ND is internallyy connected d to the GND D pins but is provided ass a separatee output to cconnect with the source RS‐422 R conne ection. Please see Figurre 2 on how w to interfacce the SSPA RS‐422 with the system o or source RS‐‐422. Table 2: 25 Pin Micro o D Connector Pinout De escription Figure 1: RS‐422 connection with h system Digital Protocols 4 Communication with the SSPA is done through RS‐422. However, there are two discrete pins: RFTXEN and SUMFLT. RFTXEN is a hardwired TTL controlled pin for disabling RF power in case of emergency. This pin is high through an internal pull‐up. To disable the unit, simply ground this pin. SUMFLT is a hardwired TTL level (+3.3V high) signal that indicates a fault when HIGH and no fault when LOW. The fault status can be read through the RS‐422. The serial format is shown in Table 3. As standard, a high‐to‐low transition indicates the start of the data. A newline (“\n”) following the command indicates the end of the command. In terms of defaults, at power the gain is set to the minimum gain of 35dB. In order to adjust this, use the gain control command from Table 4. See Example 5, for a sample command to set the gain control to +10.7dB. See command examples on the following page. The command part is bolded and the response is un‐bolded. Table 3: Serial Format Baud Rate Data Bits Parity Stop Bits Flow Control 115200 bps 8 None 1 None Table 4: RS‐422 Command List Indicates Firmware Version “VER” Indicates Unit Serial Number “SN” Turns Command Echo OFF (command sent is not repeated back) “ECHO 0” Turns Command Echo ON (command send is repeated back) “ECHO 1” Turns RF Power OFF “RF0” Turns RF Power ON “RF1” Reports Fault Status “STA” Reports Forward Output Power (dBm) “POUTF” Reports Approx. Reverse Output Power (dBm) “POUTR” Gain Control (+0dB to +20dB), 4 digit HEX value (HHHH) “GC WORD HHHH” represents the gain control value 0 to 200 where the right most digit represents the tenths decimal place. “TEMP” Reports PA Temperature (˚C) Example 1: Turn on RF Power, Echo disabled RF1\n 5 PA ON Example 2: Turn on RF Power, Echo enabled RF1\n RF1 PA ON Example 3: Fault Status (No Fault), Echo disabled STA\n FAULT = 0 Example 4: Temperature, Echo disabled TEMP\n TEMPERATURE = 25.1 Example 5: Set Gain control to +10.7dB, Echo disabled GC WORD 006B\n DAC VALUE = XXXX The response from this command will be changed in future revisions. This was used for DEBUG purposes. Example 6: Read Power POUTF\n FWD POUT = 40.5 Example 7: Turn off RF Power, Echo disabled RF0\n PA OFF 6 TELEDYNE MICROWAVE SOLUTIONS NF v1 7