User's Manual

70-STR1700-000 Rev A.1 STR-1700 O&M Manual

Item

Specification

Control Connector in/out, push-to-talk, and programming interface.

Power Connector AMP High Power DC

Channel Spacing UHF: Selectable to either 25 KHz or 12.5 KHz channel spacing.

VHF: Selectable to either 30 KHz or 15 KHz channel spacing.

RF Output Power

Selectable between 5 and 30 watts (±2%) into a VSWR of 2:1 or better.

(ETSI models limited to 25 watts max.)

Output Impedance 50 ohms, nominal

Output Protection Operating into a 10:1 VSWR of any phase angle will not damage the

transceiver.

Modulation FM with a rated deviation of +/- 5 KHz for 25 KHz channel spacing and

+/- 2.5 KHz for 12.5 KHz channel spacing.

Modulation Sensitivity An 80 mvolt RMS audio input signal produces 60% of rated deviation.

Turn-On Time Within 20 msec (UHF models) or 40 msec (VHF model) of application of

the keying signal, the transceiver reaches 90% of programmed output

power and is capable of transmitting an on frequency signal with a

SINAD of 30 dB or greater.

Spurious and Harmonic

Output

-70 dB below rated power

Audio Input Impedance

10 K Ohm ±20%

Transmit Audio Frequency

Response

Flat response over the 300-3000 Hz range. No pre-emphasis.

Minimum Duty Cycle Capable of 30 seconds transmit keying or 25% continuous duty cycle.

Output S/N Ratio 30 dB minimum fully modulated

Spurious Leakage -57 dBm maximum

Selectivity 70 dB minimum for 25 KHz channel spacing and 60 dB min. for 12.5 KHz

spacing

Intermodulation 65 dB mininimum

Dynamic Range With input signals ranging from -100 dBm to 0 dBm, the SINAD at the

receiver is 23 dB minimum when receiving a signal modulated with a 1

KHz tone at 60% rated deviation

Sensitivity 0.5 uV (12 dB SINAD) minimum

Spurious and Image

Rejection

70 dB minimum

Transmit to Receive

Recovery Time

30 msec maximum measured from removal of keying signal to the

transmitter

Audio Output A 1 KHz signal at 60% rated deviation produces a 1 V p-p audio output

into a 600 ohm resistive load.