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4.1.4 MULTIMETER
The SR–30/SR–40A is equipped with a multimeter. The multimeter is controlled by the meter select switch.
The following text presents a description of the multimeter switch positions. To use the multimeter, operate
the switch to the desired position and view the indication on the meter. The green values on each meter scale
present nominal values.
SIGNAL LEVEL (ATT) – Displays the input signal level in microvolts. The nominal level is 100 uV. The signal
level will be accurate only when the MAX SIG indicator is illuminated. For example, if the ATT indicator is
illuminated and the meter indicates 100 uV, the actual signal level is less than 100 uV due to the attenuation.
DECODE LEVEL – Displays the decode level in volts peak–to–peak. The nominal level is 2V p–p. POWER SUPPLY
– Displays the dc power supply voltage. The nominal level is +12V dc.
MONO PROGRAM LEVEL – Displays the audio output level in dBm. The nominal level is +8 dBm.
4.1.5 POWER INDICATOR
An indication that power is applied to the unit is provided by the POWER indicator. The POWER indicator will
illuminate when power is applied to the unit.
4.1.6 AFC LOCK INDICATOR
The AFC LOCK indicator illuminates to indicate the receiver is locked to the selected frequency. The indicator
will flash to indicate the receiver has become unlocked from the selected frequency.
4.1.7 SR–30 FREQUENCY SELECT F1/F2
The SR–30 operating frequency is controlled by the FREQUENCY SELECT switch. Indicators F1 and F2
illuminate to indicate the unit is operating on the F1 frequency or the F2 frequency. To change the operating
frequency, proceed as follows:
1. Depress the FREQUENCY SELECT switch.
The AFC LOCK indicator will flash quickly to indicate the unit has changed frequencies. The unit will toggle to
the opposite frequency as indicated by the F1/F2 indicators.
4.1.8 SR–40A frequency select
The SR–40A operating frequency is controlled by the FREQUENCY SELECT switches and the EXECUTE switch.
The operating frequency is selected using the 9 FREQUENCY SELECT pushwheel switches. The EXECUTE
button is used to assign the frequency once selected. To change the operating frequency, proceed as follows:
1. Determine the 9 digit operating frequency. Use the 9 FREQUENCY SELECT switches to enter the
operating frequency.
2. Depress the EXECUTE switch.
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