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IS-1

Interoperability Switch

Manual Revision: 2011-10-11

Covers PCB Revisions:

B

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Summary of Contents for IS-1

Page 1: ...1 IS 1 Interoperability Switch Manual Revision 2011 10 11 Covers PCB Revisions B ...

Page 2: ... Specifications 3 General Information 4 Hardware Installation 5 Hardware Alignment 6 Dip Switch Settings 6 Controls Indicators 7 Operation 8 IS 1 Option C 9 Theory of Operation 10 Technical Notes 11 Contact Information 11 ...

Page 3: ...aptor 12 18 VDC Current with Power LED 11 ma Current VOX or PTT LED 2 ma Radio Inputs Outputs Audio Input Level 50 mVpp 20 Vpp AGC Dynamic Range 50 db Audio Output to Mic Circuit Constant 1 3 Vpp or 0 65 Vpp Dip Switch Settable Audio Output Impedance 1 k or 47 k Dip Switch Settable COR Input Logic Low PTT Out Open Collector Logic Low Mechanical Dimensions 1 85 H x 5 1 W x 5 3 L Operating Temp 30 t...

Page 4: ...into the opposite radio B s microphone circuit 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 There is a monitor output jack that can be used for recording ...

Page 5: ...power cannot be connected to the radio use the 9 6 Volt battery power or the optional wall adaptor 12 18 VDC J1 7 PTT Out Yellow This open collector provides a ground during PTT Connect this to the PTT of Radio 1 J1 8 Speaker Violet Connect to Speaker of Radio 1 J1 9 Speaker or Single Ended Speaker High Orange Connect to Speaker of Radio 1 Radio 2 uses connector J4 with the following connections J...

Page 6: ...dios turn on the radios and set the volume control to a low level of say one quarter to one half off the low end The AGC will provide a constant level for ranges of 50 mVpp to 20 Vpp Most portable radios if turned to max volume will distort the audio wave form at the speaker DIP SWITCH SETTINGS The following table shows the default jumper settings and their function Dip Switch Number Default Posit...

Page 7: ...een LED indicates that the IS 1 is applying push to talk to Radio 2 On Off On Power Switch The power switch is a 3 position switch with the middle position being off With the switch in the upper position the unit gets power from an external source such as one of the radios or an optional wall adaptor In the lower position the unit can get power from a customer supplied 9 V battery External Optiona...

Page 8: ...e unit gets power from an external source such as one of the radios or an optional wall adaptor In the lower position the unit can get power from a customer supplied 9 V battery Using CTCSS or DCS If it is not desired to have the IS 1 repeat all activity Midian recommends using a different channel with the same frequency set for a different CTCSS DCS decode IS 1 and encode field radio When the fie...

Page 9: ...int 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 P1 10 Disable Output This pin provides the output to disable or enable the IS 1 P1 11 Program Enable This pin must be grounded prior to applying power to the IS 1 Option C in order to program the IS 1 Option C P1 12 Program Input This is the program input line from Midian s KL 3 to progra...

Page 10: ... eventually exceeding the comparators threshold turning off the PTT The hang time can be reduced from 900 msec to 600 msec by closing the Hang Time dip switched thus shorting out R24 A logic low on the COR input on connector J4 5 can also discharge C18 via diode D6 turning on the PTT comparator When using the COR turn off the VOX enable switch The IS 1 employs a 5 volt regulator to power the circu...

Page 11: ...go ahead beeps must be disabled in the connected radios MIDIAN CONTACT INFORMATION Midian Electronics Inc 2302 East 22nd 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 ...

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Page 13: ...45 10 MIC_AUDIO RADIO_1 J1 3 RJ45 10 SPEAKER HI RADIO_2 J4 9 RJ45 10 SPEAKER RADIO_2 J4 8 33 R66 2 2u C80 RJ45 10 PTT_OUT RADIO_1 J1 7 RJ45 10 COR_IN RADIO_2 J4 5 1K R33 1K R27 VDD VDD A 200K R12 200K R46 1K R30 1K R29 1K R32 1K R31 2R R55 EXT OFF BAT EXTERNAL POWER 560p C77 560p C68 560p C70 560p C83 560p C15 560p C8 560p C4 560p C21 560p C1 560p C79 OR SPEAKER OR SPEAKER 50mV 10VPP 50mV 10VPP VO...

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