HF-VHF/UHF Crossgate
The HF-VHF/UHF crossgate provides seamless communications between HF and VHF/UHF networks.
The Crossgate is an effective and affordable solution for extending the line of sight reach of a conventional VHF/UHF networks by linking them to an HF network using HF transceivers.
TheHF-VHF/UHF crossgate can also be used to give field operators with VHF/UHF handheld radios access to the HF network when away from their vehicles. The crosspatch links or unlinks the HF and VHF/UHF networks by either a specific Selcall sent from a station on the HF network or by a specific DTMF sequence sent by a station on the VHF/UHF network.
When the networks are linked, received audio from the HF network is broadcast on the VHF/UHF network and vice versa.
General specifications
| Indicators | Power on- Connected- HF PTT – VHF/UHF – PTT”, Speaker level clip indicator |
| Controls | “VHF/UHF speaker level gain” |
| Input power | +11 to +15 V DC (12 V DC nominal) |
| Input current | 176 mA @ +12.6 V input |
| Sealing | IP41 |
| Weight | 0.18 kg |
| VHF/UHF Signal connections | |
| Balanced audio in | Rx balanced audio in, 600 ohm input impedance, 0 dBm recommended |
| VHF/UHF speaker level audio in | Radio speaker level single ended audio input, 10 k ohm input impedance, gain adjustable on the crossgate |
| VHF/UHF mute in | Active low, radio mute state input, optically isolated |
| VHF/UHF audio out | Tx balanced audio out, 0 dBm nominal into 600 ohm load |
| VHF/UHF mic level audio out | Tx single ended audio out, mic input level |
| VHF/UHF PTT out | Active low, radio external PTT keying |
| VHF/UHF ground | 0 V radio ground, internally RF isolated |
| HF Signal connections | |
| HF ground | 0 VHF radio ground |
| +13.8 V | +13.8 V power from HF radio |
| RS-232 I/O | RS-232 control signals between HF radio and crossgate |
| HF balanced audio in | Rx balanced audio in, 600 ohm input impedance, 0 dBm recommended |
| HF balanced audio out | Tx audio out, 0 dBm nominal, into 600 ohm load |
| HF PTT out | Active low radio external PTT keying |
| HF mute in | Active low radio mute state input |
| Environmental | |
| Operating temperature | -20°C to +55°C |
| Storage temperature | -40°C to +85°C |
| Humidity | Up to 95% @ 55°C |
| Shock | MIL-STD 810G |
| Vibration | MIL-STD 810G |
