Operating instructions

Wood & Douglas Ltd, Lattice House , Wood & Douglas Ltd 2005
Baughurst, Tadley, Hants, RG26 5LP
Tel:[phone] Fax: [phone]
email: [e-mail]
website: www.woodanddouglas.co.uk
12 1892 1236 - SX500 Transmitter Operator Note - v1.6.1 / Apr 2005
Transmitter
RF Output Power 100mW +1, -2 dB adjustable down to 1mW
Receive to Transmit Switching
Time
<25ms
Power-on settling time <60ms
Modulation Input Analogue : 750 mV p-p nominal
Digital: DC coupled TTL compatible
Frequency Response <10 - 3000 Hz flat (at -3dB)
Receiver
Sensitivity -115dBm/12dB SINAD at 25kHz channel
spacing
AF Output 250mV p-p into 10kO (muted by Squelch)
RSSI Output 0.5 - 2.0V with 60dB range and 33kO o/p
impedance
Squelch Type Noise operated with hysteresis.
Squelch Flag Open collector to <0.4V with 10kO load.
Low = No Signal