Global Microwave Systems STS10000 User Manual 8

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Document ID	1541
Application ID	74CK2goNEBldJOgjxa8pjA==
Document Description	8
Short Term Confidential	No
Permanent Confidential	No
Supercede	No
Document Type	User Manual
Display Format	Adobe Acrobat PDF - pdf
Filesize	12.89kB (161070 bits)
Date Submitted	1998-05-09 00:00:00
Date Available	1998-06-02 00:00:00
Creation Date	2001-07-17 09:24:10
Producing Software	Acrobat Distiller 4.0 for Windows
Document Lastmod	2001-07-17 09:24:12
Document Title	8

/¢;\\§\
GMS
GLOBAL MICROWAVE SYSTEMS, INC.
ST SERIES TRANSMITTERS
OPERATING GUIDE
SN:
GMS, Inc.
4141 Avenida de la Plata
Oceanside, Ca. 92056-6002
619/631-8021 '
Fax 619/631-8031
Email: gms@gmsinmcom
©Corpyrighl 1996
ST Series Transmitters
TABLE OF CONTENTS
ST Series Transmitters Operating Guide
1.0 INTRODUCTION .....
2.0 FUNCTIONAL DESCRIPTION...
2.03 AUDIO
2.04 VIDEO
2.05 IRS-232.
2.06 FRONT PANEL..."
3.0 FRONT PANEL OPERATION
3.01 POWER-UP
3.02 FRONT PANEL CONTROLS AND DISPLAYS
3.03 CHANNEL DISPLAY..."
3.04 POWER OUTPUT DISPLAY
3.05 AUDIO SOURCE LEVEL SELECT
4.0 INTERFACE...
10
ST Series Transmitters
ST SERIES TRANSMITTERS
OPERATING GUIDE
Introduction
The ST series transmitters are capable of transmitting analog FM microwave signals with one
video channel and two audio subcan’iers. They feature NTSC Video as standard with PAL and
SECAM as factory options. Frequency, RF power output, and audio microphone or line level
inputs are microprocessor controlled using the front panel push buttons A one—line liquid crystal
display (LCD) provides visual readouts of lock status, frequency, power output, and audio input
level selection As an additional feature, an RS-232 interface is provided for remote control of all
of the transmitter functions. Connections to the transmitter are made through 3 standard
connectors; a ten-pin PTO, a BNC, and an SMA.
2.0
Functional Description
2.01 Power
Power requirements are +1 1-15 VDC at between 1.2A - 1.8A typical. Connection to the
transmitter is made through the ten-pin PTO connector. (See Section 4.0)
2.02 RF
The RF signal is supplied to the antenna through the SMA connector. (B)
2.03 Audio
The ST series transmitters have two audio channels. Each channel is capable of being
modulated by either a microphone input level (-54 dBm @ 600 ohms) or a line level input
(0 dBm @ 600 ohms). Both audio channels are established as balanced inputs; although
unbalanced inputs may be achieved by grounding the low side of the balanced input and
applying the audio input signal to the high side of the balanced input. The audio inputs
are accessible through the ten-pin PTO style connector. (See Section 4.0) Microphone or
Line level of each audio channel is independently selectable via the front panel controls.
In addition, the audio subcarriers can be turned off (usually used in repeaters).
3.0
ST Series Transmitters
2.04 Video
ST series transmitters have one video channel. The video input is lep into 75 ohms.
The video input is accessible through the BNC (J 1) or the ten»pin PTO connector. (See
Section 440)
Composite Video input is available on Pin K of the ten-pin PTO connector. This input
bypasses the video pre-emphasis network and it is normally used in microwave repeater
configurations
2.05 RS-232
An RS-232 interface is provided on all ST series transmitters. All transminer functions
are controllable via this interface with the GMS RCB-2000 Remote Control System.
Access to this interface is provided through, the ten-pin PTO connector. (See Section 4.0)
2.06 Front Panel
The front panel consists of an LCD with four push—buttons; UP, DOWN, CTRL, and
ENTERA The front panel controls the transmitted frequency, RF power output and audio
input level selection. The LCD displays the output frequency (or channel), RF power
output and transmitter frequency lock status.
Front panel Operation
3.01 Power-Up
On power-up, the unit will display a pre-coded customer name and serial number, then set
the channel to the one in use at last power-down. The display will look like this:
TX Cl'l A H I
Where:
TX = transmitter locked
CH A = transmitter channel or frequency
- HI = transmitter output power level; ST, LO, HI
3.02 Front Panel Controls and Displays
The CTRL key selects the applicable transmitter control. For example, for each press of
the CTRL key the transmitter control fimctions are selected as shown:
ST Series Transmitters
TX CH A HI CHANNELDEPLAY
CTRL pressed
POWER  POWEROUTPUT
CTRL pressed
AUDIO 1  AUDIOISOURCESELECT
CTRL pressed
AUDIO 2  AUDIOZSOURCESELECT
CTRL pressed
TX CH A HI CHANNELDEPLAY
3.03 Channel Display
In this mode, when the UP or DOWN key is pressed, the transmitter will step through the
channels. On key release the display will blink for ten seconds. If ENTER is pressed
before ten seconds, the transmitter frequency will be changed and stored in nonvolatile
memory. If ENTER is not pressed before ten seconds, the display will stop blinking and
the transmitter will reset to the previous frequency. The channel display and control
functions are shown below:
TX CH A HI
UP lncrement channel.
DOWN Decrement channel.
ENTER Save channel.
CTRL Change to POWER OUTPUT mode.
ST Series Transmitters
3.04 Power Output Display
The RF power output is selectable between three discrete levels, Standby (ST, no power
output), Low (LO, approximately 0.25 or 010 Watts output), and High (HI,
approximately 2.0 or 1.0 Watts output). The power output. display and control functions
are shown below:
POWER  HI
UP Toggle output level.
DOWN Toggle output level.
ENTER Return to DISPLAY CHANNEL mode.
CTRL Change to AUDIO LEVEL ADJUST model
3.05 Audio Source Level Select
The audio source level is also selected from the front panel with the UP and DOWN keys.
This control adjusts each input independently. When adjusting the level, the AUDIO
l/AUDIO 2 on the left of the display will blink indicating that a change in level is in
progress. If ENTER is pressed, the new level will be stored. If CTRL is pressed before
ENTER, the audio will be reset to the previous level. The audio source level is selectable
from three discrete levels, OFF (no audio subcan‘iers), MIC (microphone audio source),
LINE (line level audio source). Audio level displays and control functions are shown
below:
AUDIO 1 
UP Toggle audio 1 level,
DOWN Toggle audio 1 level.
ENTER Save audio 1 level.
CTRL Change to AUDIO LEVEL 2 ADJUST mode and cancel audio level
changes if Al flashing.
AUDIO 2 
ST Series Transmitters
UP Toggle audio 2 level.
DOWN Toggle audio 2 level.
ENTER Save audio 2 level.
CTRL Change to CHANNEL DISPLAY mode and cancel audio level changes if
A2 flashing.
4.0 Interface
The following shows the pin-out of the ten-pin PTO connector:
mm DESCRIPTION
+11-15 VDC
GROUND ,
AUDIO 1 LOW INPUT
AUDIO 2 HlGH INPUT
AUDIO 1 LOW INPUT
AUDIO 2 LOW INPUT
115-232 TRANSMIT
115-232 RECEIVE
NO CONNECTION
COMPOSITE VIDEO INPUT
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Create Date                     : 2001:07:17 09:24:10
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Page Count                      : 10

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