Try our Frames Site, if your browser supports it - it loads much faster.

Q. Is Transcrypt type approved and EMC approved for Western Europe?

A. No. But please note that many users today do not need type approval.

Q. Can I install Voice Privacy into other Motorola products? If not, how do I make my other communications equipment scrambling compatible?

A. No, currently the HT1000, GP300 (PL only) and GM350 are offered. The Voice Privacy is compatible with the SC20-410 scramblers from Transcrypt international for encrypting messages and encryption upgrades are available.

Q. Will scrambling affect the range of the radio?

A. In general, there will be minimal reduction in the range of the system when the scrambler is activated. If a system has a good coverage, then there will be no noticeable effect. However, scrambling will not work well in portions of the systems where unscrambling communications are already difficult.

Q. Is Voice Privacy approved for use in Cenelec FM, MSHA or CA approved radios?

A. No, it currently does not have any agency approvals for use in Cenelec FM, MSHA or CA approved HT11 radios.

Q. Will scramblers work with repeaters?

A. Yes. All of the scrambled audio and signalling are performed in the audio band, so it is completely transparent to standard repeaters. The delay timing of the Scrambler synchronisation data burst can be adjusted so that the scrambler can be optimised for specific repeater systems. N.B. Repeaters hang-times and digital audio links may require changes.

Q. Is scrambling compatible with DTMF Encode?

A. Yes, you can use both 5-tone and scrambling. The 5-tone signalling is not scrambled. It is important to note that audio delays may need to be changed in the radio to enable transmission of the synchronisation data burst. N.B. Due to space limitation 5-tone GP300 is not offered.

Q. Is scrambling compatible with DTMF Encode?

A. Yes. If the radio generates DTMF signals, scrambling can still be used. DTMF tones are not scrambled. Note: if the user wants to scramble phone patch calls, a scrambler must be installed at the interconnect device.

Q. Can scrambling be used with scan?

A. It is not recommended that scramblers be used in systems that need scan operation. Scanning may cause a receiving radio using analog scrambling to lose synchronisation. If synchronisation is lost by the receiving radio, the operator will hear scrambled audio until the next time the PTT is pushed by the transmitting operator and a new synchronisation packet is sent. Priority scan should NOT be used in scrambler installed system.

Q. Can scrambling be used on voting systems?

A. It is not recommended that scramblers be used in voting systems. If the system votes from one receiver to another during a conversation, the synchronisation could be lost.

Q. Can scrambling be used on a trunking systems?

A. It is not recommended that scrambling be used in trunking systems. For the scrambler to synchronise, the initial data burst must be received by all units. Many trunking systems do not guarantee a voice channel when PTT is pressed, so the scrambler synchronisation packet can be missed by receiving radios.

Q. Can scrambling be used on a simulcast systems?

A. It is not recommended that scramblers be used in simulcast systems. Scrambling in not usable on a simulcast system due to the overlapping coverage areas and their effect on the synchronisation data.


Send mail to
with questions or comments about this web site.
Last modified: February 09, 2006