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RF Technology R50
7.4.15 Receiver Fr equency Spr ead
Less than 1dB change in sensitivity over the band
7.4.16 Receiver Conducted Spur ious Emission
Less than -67dBm from 1 to 3000MHz
7.4.17
Audio Fr equency Response
(a) 600 Ohm Line and Direct Output:
+1/-3 dB 300 - 3000 Hz relative to either a flat response or 750 uSec. de-
emphasis
(b) Sub-Audio Output:
+1/-3dB 67 - 250 Hz @ 3kHz deviation
7.4.18
Audio Output Level
(a) 600 Ohm Line:
Adjustable -10 to +10 dBm
(b) Monitor Loudspeaker:
5 Watts with external speaker, 0.2 Watt with internal speaker
(c) Discriminator and Sub-Audio:
Nominally equal to 1 volt peak at rated system deviation
7.4.19 Audio Distor tion
With 750 uSec. De-Emphasis:
Less than 3% at 1 KHz and 60% of rated system deviation
With Flat Response:
Less than 3% at 1 KHz and 60% of rated system deviation
7.4.20 Channel Select Input/Output
Coding - 8 lines, BCD coded 00 – 99; illegal BCD codes used to encode
channels 100 – 255.
If the MSN (Most Significant Nibble) is greater than 9, then the channel number is
defined by the formula:
16*MSN + LSN;
where the LSN is the Least Significant Nibble.
If the MSN is less than 9, but the LSN is greater than 9, then the channel number is
defined by the formula:
10*LSN+MSN;
Logic Input Levels - High for <1.5V, Low for >3.5V
Internal pull up resistors select channel 00 when all inputs are O/C.
