Several of the SNV-12 Signal-and-Noise Voter Comparator modules are being updated. The reasons for this generally are:
- Ensure overall SNV-12 longevity by updating components that have been or will be reaching their end of life.
- Modernize and expand SNV-12 Voter capability.
- Improve the user experience by updating the user interface.
CPM-5 Replaces CPM-3
The CPM-5 was introduced in 2025 and its additional processor power means that it will be able to use new Voter features and functionality well into the future. Its predecessor, the CPM-3, is not slated for any future software releases other than bug fixes and is no longer shipped with new orders.
The CPM-5:
- The CPM-5 uses a web-based interface for all user configuration items. The CPM-3 used DIP switches and required the user to pull the CPM-3 out of the chassis and change DIP switch settings for many of the parameter changes. In the CPM-5, the user simply browses to the appropriate internal web page and makes their selections.
- The CPM-5 has enhanced RoIP-based monitoring functionality. Both the CPM-3 and CPM-5 can monitor voted audio and console transmissions but the CPM-5 also allows the customer to use a JPS RoIP device such as an NXU-2B or an RSP-Z2 to be able to send audio to the voter. This audio can be broadcast to the radios in the field or it can be sent to the console.
- The CPM-5 comes with some SNMP support as part of its standard software. This allows SNMP managers to monitor the voter for faults and accept “traps” or notifications when a fault occurs.
- The CPM-5 has more processor power than the CPM-3 did, which means it is capable of new Voter features and functionality.
Special Considerations:
- The CPM-5 is backwards compatible with most existing systems of SVM-2s and SVM-3s (or SVM-3Bs) controlled by CPM-3s. However, the CPM-5 is not compatible with SVM-1s.
- In an expanded, multi-voter system of two or three SNV-12 chassis, all Voter chassis must have the same CPM type (all CPM-3s or all CPM-5s).
SVM-3B Replaces SVM-3
In 2026, the SVM-3 is being replaced by the SVM-3B. The additional processor power of the new SVM-3B means that it will be able to use new Voter features and functionality well into the future. Its predecessor, the SVM-3 will not be able to provide these enhancements, is not slated for any future software releases other than bug fixes and is not shipped with new orders.
The SVM-3B:
- The SVM-3B is a drop-in replacement for the SVM-3 and is fully compatible with existing IP-capable systems controlled by a CPM-3 or a CPM-5. No additional upgrades or purchases are required.
- The SVM-3B uses modern components that are more available than those used on the SVM-3. This improves overall reliability, reduces potential downtime, and speeds up manufacturing.
- The SVM-3B operates faster than the SVM-3. Beyond improving startup time, it also speeds up operation. That means it has faster polling times for quicker voting. The reduction in latency is especially helpful for systems using Repeat mode.
- The SVM-3B has more processor power, which means it is capable of new Voter features and functionality as they are developed.
Special Considerations:
- Like the SVM-3, the SVM-3B must be controlled by a CPM-3 running software version 3.xx or a CPM-5.
- Like the SVM-3, the SVM-3B works in tandem with the QMT, one at each remote site.