Midian’s VS-1000 series of inversion voice scramblers protect your voice communications against casual listeners. By mixing the frequency of the voice with an inversion tone in a balanced modulator, sum and difference frequencies are created. A low-pass filter eliminates the sum and the difference is transmitted as “inverted voice”. The “inverted voice” undergoes an identical process on the receiving end that reconstructs the voice.

Midian’s VS-1000-MPP1 plugs into the Motorola Professional Series portable radios. These include the:

GP-140, GP-328, GP-328-LS, GP-329, GP-338, GP-338-LS, GP-339, GP-340, GP-360, GP-380, GP-640, GP-680, HT-750, HT-1250, HT-1250-LS+, MTX-850-LS, MTX-8250-LS, PR-860, PRO-5150, PRO-5350, PRO-5450, PRO-7150, PRO-7350, PRO-7450, PTX-700 and PTX-760.

• User-programmable to any inversion code between 2100 – 4096 Hz
• User-programmable for up to 16 codes
• Plugs into Motorola Professional Series mobile radios
• Protects against casual listeners
• Programmable after installation in the radio using our MPS software and the RIB