Table 1-2. Capabilities and Limitations (Sheet 2 of 6)

TO 31R2-2GRC171-2

TM 11-5820-815-14

NAVELEX 0967-LP-544-5010

CHARACTERISTIC

SPECIFICATION

GENERAL (Cont)

Channel spacing

25 kHz.

NOTE

The radio set is capable of tuning to 1 of 7000 frequency channels spaced at 25-

kHz intervals. However, the receiver selectivity is determined by the crystal filter

(A4FL1) installed in the 10.7-MHz if circuit of receiver rf module A3. The bandwidth

of the filter supplied with the radio set is 36 kHz (6-dB resonant response). This

makes the radio set compatible with 50-kHz channel spacing. To make the radio

set compatible with 25-kHz channel spacing, the filter must be replaced with a 20-

kHz bandwidth filter. To allow reception of wide bandwidth data, the filter must be

replaced with a 60-kHz bandwidth filter (100-kHz channel spacing).

0.0005% both transmit and receive.

Frequency stability

0.0005% both transmit and receive.

Frequency accuracy

seconds maximum after selection of last digit.

Tuning time 10

2 minutes.

Warm-up time

Duty cycle

90% with 9 minutes (90%, 1-kHz modulation) transmit and 1 minute receive.

Transmitter

Continuous.

Receiver

50-ohm, N-type connector.

Antenna input

RECEIVER

Sensitivity

3 microvolts (30% modulation, 1000 Hz) applied at the antenna will produce an

audio output of 100 milliwatts into 600 ohms with a 10-dB (minimum) signal-plus-

noise to noise ratio.

Selectivity

Receiver selectivity is determined by the crystal filter (A4FL1) installed in the 10.7-

MHz if amplifier. Refer to note in general specifications of this table.

RESONANT RESPONSE

TOTAL BANDWIDTH

(dB)

(kHz)

Narrow bandwidth

36-kHz filter

(50-kHz channel

spacing)

1-5