Summary of Contents for Midian IS-1
- Page 1 IS-1 Interoperability Switch Manual Revision: 2011-10-11 Covers PCB Revisions:...
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Page 2: Table Of Contents
TABLE OF CONTENTS Specifications General Information Hardware Installation Hardware Alignment Dip-Switch Settings Controls & Indicators Operation IS-1 Option C Theory of Operation Technical Notes Contact Information... -
Page 3: Specifications
SPECIFICATIONS Voltage/Current: Internal Battery Voltage 9.6 Volts Alkaline Battery Capacity ~565 mAh Battery Life (estimated) 45 hours External Power from Radio 6 - 18 VDC External Power from Optional Wall Adaptor 12-18 VDC Current with Power LED ~11 ma Current VOX or PTT LED 2 ma Radio Inputs/Outputs: Audio Input Level... -
Page 4: General Information
When using portables the receive audio from radio ”A” is detected by the IS-1’s VOX circuit keying radio “B” which passes the above mentioned audio to radio “B”. When using mobile radios, the VOX is not used and instead the IS-1 converts the COR from radio “A” to a push to talk signal keying radio “B”. -
Page 5: Hardware Installation
Be certain to follow standard anti-static procedures when handling any of Midian’s products. Use the enclosed matching cables with RJ45 type connectors to plug into the IS-1. The other ends can be connected to the appropriate type of radio connector using the pin out and color codes show below. See connector pin out in the chart below. -
Page 6: Hardware Alignment
HARDWARE ALIGNMENT The IS-1 can use VOX or COR from one radio to act as a PTT to key the other radio. COR is the preferred method if the radio offers this connection as it will not drop out if the user stops talking momentarily. When using COR turn off the VOX dip-switch. -
Page 7: Controls & Indicators
Radio 1 COR LED: This yellow LED indicates that the IS-1 is receiving COR from Radio 1. Radio 1 PTT LED: This green LED indicates that the IS-1 is applying push to talk to Radio 1. Radio 2 COR LED: This yellow LED indicates that the IS-1 is receiving COR from Radio 2. -
Page 8: Operation
OPERATION The IS-1 is connected between 2 radios. When the IS-1 receives COR or VOX from Radio 1, for example, the IS- 1 will light the Radio 1 COR LED then assert the PTT Output to key Radio 2, light the Radio 2 PTT LED and pass the audio received from Radio 1 to Radio 2 to be retransmitted. -
Page 9: Option C
P1-5: Programming Alert Tone Output: When programming this output can provide programming confirmation tones. P1-6: Receive Audio Input: This is the point in the audio path of the IS-1 that the IS-1 Option C looks for the signaling to enable or disable the IS-1. -
Page 10: Theory Of Operation
Alkaline batteries are cheap and readily available and have a 565 mAh capacity. Lithium could also be used and have a higher mAh ratting. If the IS-1 Option C is used it jams the PTT from the VOX circuit by grounding the base of Q3 via D3:2 during disable. -
Page 11: Technical Notes
TECHNICAL NOTES VOX Detect: When using VOX detect go ahead beeps must be disabled in the connected radios. MIDIAN CONTACT INFORMATION Midian Electronics Inc. 2302 East 22 Street Tucson, Arizona 85713 USA Orders: 1-800-MIDIANS Phone: 520-884-7981 Fax: 520-884-0422 E-mail: sales@midians.com Web: www.midians.com... - Page 12 This page intentionally left blank...
- Page 13 2.2u U2:2 LMV324 100p 560p .001u 7.5K 9.1K 5.1V 2.2u 2mm Pin 5.5mm OD EXTERNAL POWER DOCUMENT NAME MIDIAN ELECTRONICS, INC. IS-1 ihs7704b2_is1 APPR 2009-08-01 DATE: DWN BY: SCHEMATIC SHEET PROJECT NUMBER 1 of 1 7704 DESIGN: REV: 2009-11-05 COPYRIGHT © 2009...
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