Comtech EF Data CSAT-6070 - Manual (Page 106)

5 to 25 Watt C-Band Transceiver Revision 0
Maintenance and Troubleshooting MN/CSAT607025.IOM
1. The transceiver 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 6725 to 7025 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 25 Watt SSPA to the desired output level.
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). The signal is then amplifed to the
desired output level.
C.2 T
ROUBLESHOOTING
Transceiver 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
transceiver functions will be displayed as described in
Appendix A (see the Retrieve
Alarm Status commands).
C.3 C
ONVERTER
F
AULTS
Check the Alarm Status for possible faults, or an indication of a marginal performance
tolerance condition.
C.3.1 DC P
OWER
S
UPPLY
V
OLTAGES
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.
C.3.2 RF C
ONVERTER
M
ODULE
Synthesizer and IFLO Lock Detect Fault:
C–2