The divided reference signal and the divided multiplier
signal are compared in the PLL phase detector. When the
reference and multiplier signals are identical the PLL phase
detector generates a constant DC output voltage. This voltage
is buffered by U8 and filtered by the loop filter circuit. It is then
applied to Q1 setting the VCO on frequency.
If the compared frequencies (phases) differ, an error voltage
is generated which adjusts the VCO frequency. During this
out-of-lock condition, the PLL also sends a Lock Detect (LD)
signal to the controller and lights the FAULT LED on the front
panel of the module.
Copyright© June 1992 Ericsson GE Mobile Communications Inc.
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Table 1 - General Specifications
ITEM
SPECIFICATION
FREQUENCY TUNING
Mechanical
Electrical
Full Specifications
Degraded Specifications
Channel Spacing
INJECTION FREQ
FREQ. BAND
424.4 MHz-451.4 MHz (G3)
450-470 MHz, 403-425 MHz
446.4 MHz-472.6 MHz (G7)
425-450 MHz, 470-495 MHz
401.4 MHz-421.4 MHz (G8)
380-400 MHz
470.6 MHz-490.6 MHz (G10)
492-512 MHz
391.4 MHz-421.4 MHz (G12)
370-390 MHz
2 MHz
3 MHz
6.25 kHz
FREQUENCY STABILITY
LO POWER OUTPUT
LO NOMINAL IMPEDANCE
PHASE NOISE
@ 25 kHz Offset
HUM AND NOISE
Companion Receiver
±
1.5 ppm
2.0 dBm
±
2 dBm
50 ohms
>-137 dBc/Hz
-55 dB
HARMONICS @ LO PORT
SWITCHING SPEED
CURRENT DRAIN
+13.8V
+12V
<-30 dBc
<50 ms
<200 mA
<50 mA
REFERENCE OSCILLATOR
Frequency Output
Power Output
Impedance
12.8 MHz
±
1.5 dBm
1 dBm
±
2 dBm
50 ohms
EXT. REFERENCE OSCILLATOR
Frequency
Power
Impedance
5.00 MHz to 17.925 MHz (must be integer
divisible by the channel spacing)
+10 dBm
±
3 dBm into 50 ohms
50 ohms
This manual is published by Ericsson Inc., without any warranty. Improvements and changes to this manual necessitated by typographical errors,
inaccuracies of current information, or improvements to programs and/or equipment, may be made by Ericsson Inc., at any time and without
notice. Such changes will be incorporated into new editions of this manual. No part of this manual may be reproduced or transmitted in any form
or by any means, electronic or mechanical, including photocopying and recording, for any purpose, without the express written permission of
Ericsson Inc.
LBI-38672J
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