Ramsey Electronics SG560 Uživatelská příručka Strana 19
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Hodnocené. / 5. Na základě hodnocení zákazníků
19
BASIC OPERATION
2.06.02 Generating Using External MOD IN
The external modulation mode allows
modulation from an external source via the
MOD IN jack. The value you enter for
deviation or % AM is followed exactly, and is
automatically adjusted by the AGC (automatic
gain control).
Any level from an external generator between 100mV and 2V peak will be compensated with
the AGC circuit. Remember there are three types of AGC supported by the COM3010. These
three modes are cycled using SHIFT, EXT. To enter tone mode, press
until you see the SIN waveform icon for tone mode. The FM field will already be selected
since you cannot enter a tone frequency here, so then enter 3, kHz/mV.
To enter a tone mode with 50% of AM modulation, press
making sure the AGC icon still indicates tone mode.
AGC
Icon
Mode Name Description
Voice AGC
Voice AGC: Attack and decay are both fast to track voice levels and
bring them to an acceptable level. Peaks will be limited to the set
modulation.
Tone AGC
Tone AGC: The AGC will attack (reduce the level) quickly, but decay
(increase the level) slowly. This allows tone signals to be as steady
as possible in level.
Digital AGC Digital AGC allows attack only, no decay. This prevents
overmodulation at the start of a data stream when sending certain
paging formats. This special mode allows for 4-level paging without
“breathing” of the AGC. Breathing is a term used for AGC that is
adjusting too rapidly.
This mode must be “trained” for two seconds with the source to
stop the AGC from adjusting. Once trained, the AGC turns off.
GENERATE TX Level
Modulation Seq/Reg
- COM3010 SERVICE MONITOR 1
- 1.00 INTRODUCTION 5
- 1.01 Opening the Box 6
- 1.02 Overview 8
- 2.00 BASIC OPERATION 13
- 2.01 Generating a Frequency 14
- Modulation Seq/Reg 15
- GENERATE TX Level 15
- 2.05 Muting the Generator 16
- External 17
- 2.06.03 Generating CTS 20
- 2.06.04 Generating DCS 21
- 2.06.05 Modulation Steps 22
- RECEIVE Level Meters 23
- Counter Freq Meters 23
- 2.07 Receiving a Frequency 25
- 2.11 Using the Level Meters 29
- 3.10 Transmitter Tests 35
- 3.10.02 Power Measurements 37
- H, depending on frequency 39
- 3.20 Receiver Tests 41
- 3.20.02 SINAD Measurements 42
- 3.20.05 Two-Tone Paging 46
- FIGURE-1 51
- ISO-T CALIBRATION 51
- FIGURE-2 52
- DESENS TEST SETUP 52
- REPEATER 52
- RX PASS – RECEIVER SIDE 54
- TX PASS – TRANSMITTER SIDE 55
- 4.00 ADVANCED FEATURES 57
- 4.10 Memories 58
- Memories (Continued) 59
- 4.20 Smart Link 61
- 4.30 Scanner 62
- 4.30 Scanner (Continued) 63
- 4.40 Sweep Generator 64
- 4.50 User Options: 66
- General Options: 67
- On the GENERATE screen: 67
- General Options (Continued) 68
- On the RECEIVE screen: 68
- Serial Port Options 68
- Clear Memories: 69
- 4.60 Battery Power Saver 69
- 5.00 USER CALIBRATIONS 71
- 5.00 USER CALIBRATIONS 72
- 6.00 DETAILED INFORMATION 77
- Attenuator Table 80
- 6.50 RS232 Communications 83
- 6.50.02 SYS Commands 86
- 6.50.03 SET Commands 87
- 6.50.04 MEM Commands 89
- 6.50.05 GET Commands 90
- 7.00 APPENDIX 95
- APPENDIX B 98
- CTS TONE FREQUENCY LIST: 98
- APPENDIX C 98
- DCS CODE LIST: 98
- APPENDIX D 99
- TWO TONE MODES: 99
- APPENDIX E 99
- GENERAL OPTIONS TABLE 99
- COM3010 SPECIFICATIONS 100
- Certification 103
- Warranty 103
- COM3010 104
- January 2005 104
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