June, 2000
6880905Z99-O
7-1
Section 7
Radio Tuning Procedure
Radio Tuning Procedure
General
An IBM PC (personal computer) and RSS (Radio Ser-
vice Software) are required to align the radio. Refer to
the applicable RSS Manual for installation and setup
procedures for the software.
To perform the alignment procedures, the radio must
be connected to the PC, RIB (Radio Interface Box), and
Test Set as shown in Figure 7-1.
Service Menu
Figure 7-2 illustrates the Main Service Menu structure.
All SERVICE screens read and program the radio code-
plug directly; you do NOT have to use the RSS GET/
SAVE functions to program new tuning values.
CAUTION
Do NOT switch radios in the middle of
any SERVICE procedure. Always use the
EXIT key to return to the MAIN menu
screen before disconnecting the radio.
I m p ro p e r e x i t s f ro m t h e SE RV I C E
screens may leave the radio in an
improperly configured state and result in
seriously degraded radio or system per-
formance.
The SERVICE screens use the concept of the “Softpot”,
an analog SOFTware controlled POTentiometer used
for adjusting all transceiver alignment controls.
BNC
RIB
RIB POWER SUPPLY
COMPUTER INTERFACE CABLE
DATA
GND
COMPUTER
AUDIO GENERATOR
SINAD METER
AC VOLTMETER
TX
RX
30 dB PAD
30 dB PAD
RF GENERATOR
SERVICE MONITOR
WATTMETER
TRANSMIT
RECEIVE
TEST SET
RADIO
PROGRAM or
AUDIO IN
Mini-U BNC
TEST CABLE
15-PIN
25-PIN
Note: Battery can be used in RIB
MIC IN
or COUNTER
0180357A57, 110 V, USA
RLN4008B
30-80369B72 (IBM AT, 9-PIN ONLY)
30-80369B71 (IBM XT, 25-PIN ONLY)
making power supply optional.
58-80348B33
TEST CABLE
3080070N01
RLN4460A
3008566C12
0180358A56, 110 V, USA
Figure 7-1.
Radio Alignment Test Setup