SmartSDR Version 4.1.8 introduced the option to display the radio's Transmit Bandwidth on the panadapter in the same way that the receive filter bandpass is displayed.
When this feature is enabled, the Transmit Passband will be displayed on the panadapter as a light RED "ribbon" in the same way that the Receive Passband is displayed with a BLUE ribbon.
NOTE: This is a SmartSDR+ feature.
Enable this feature in the SmartSDR "Settings" Pull-down Menu:
- Navigate to the "Settings > Radio > TX" tab:
- Click on the button "Show TX Filter in Pan:"
The Transmit Filter Bandpass will now show as a RED area on the panadapter, indicating the transmit bandpass.
When there is an overlap of the RX and TX Passbands, the TX Passband shows BEHIND the RX Passband.
If the TX Bandpass is narrower than the Receive Bandpass, it will show BEHIND the Receive Passband with reduced contrast.
The two images below show exaggerated bandpass settings to illustrate the differences:
In this first image:
- The Receive Bandwidth is 1.9 KHz
- The Transmit Bandwidth is 4.5 KHz.
At this "Dial" Frequency on 17 Meters, this transmit bandwidth would put the radio "out of band."
In this second image:
- The Receive Bandwidth is 4.5 kHz
- The Transmit Bandwidth is 2.3 kHz.
This Transmit Bandwidth would be "IN Band" at the dial frequency shown,
even though the RECEIVE bandwidth extends outside the 17 Meter Band.
Enabling this Feature From a Maestro or M-Model Front Panel:
- Tap the "MENU" Button.
- Tap the "TRANSMIT" TAB.
- Set "Show TX Filter" to Enabled.
This new feature should make it much easier to tell exactly where your radio's complete signal bandwidth will be on the band.