Comtech EF Data CSAT-5060 - Manual (Page 74)

C-Band Transceiver Revision 1
Maintenance and Troubleshooting MN/CSAT5060.IOM
7–2
7.1 Maintenance Testing
Use the instructions for installing the appropriate CSAT (refer to Appendix A, B, or C)
for checkout, and the procedures in Chapter 4, for operating the CSAT.
1. The CSAT contains an Upconverter, a Solid-State Power Amplifier (SSPA) and a
Downconverter.
2. The Upconverter translates the IF input frequency of 52 to 88 MHz to an RF
frequency of 5845 to 6425 MHz depending on the setting for the output
frequency.
3. The IF input level is -20 to -30 dBm (typical). The signal is then amplified by the
SSPA to the desired output level.
For 100W (125W) only:
≥ +50 dBm (+51dBm) at 1 dB compression.
4. The Downconverter translates the RF input signal down to the IF output
frequency of 52 to 88 MHz.
5. The RF input level is -45 dBm (typical), and the IF output level is +20 dBm at 1
dB compression
.
7.2 Troubleshooting
CSAT operating problems can be identified by first observing the status indicators
through the Communications port. When a fault condition is indicated, using the Retrieve
Alarm Status (RAS) command can identify the specific fault, or faults. The status of all
CSAT functions will be displayed as described in Chapter 6 (see the Retrieve Alarm
Status commands).
7.3 Converter Faults
Check the Alarm Status for possible faults, or an indication of a marginal performance
tolerance condition.
7.3.1 DC Power Supply Voltages
24 VDC 10 VDC
20 VDC P5 VDC (+5 VDC)
12 VDC N5 VDC (-5 VDC)
A fault ("FT") indicates a voltage level exceeding
±10% of the power supply voltage. If
the voltage exceeds
± 10%, contact Comtech EF Data.