SAMPLING rate defines the available bandwidth (frequency span) in wideband files.

Jaguar is designed for MW DXing and thus it supports only two SAMPLING rates for recorded files (1600 kHz and 2000 kHz), both these cover the full MW dial. Native Perseus package supports only one such sampling rate (2MHz) with full MW coverage, this same 2MHz (SAMPLING 2000) is also available in Jaguar. Use this sampling rate is you want to keep compatibility with Perseus.exe as far as playback is concerned.

In addition to 2MHz, Jaguar Pro users can use also 1.6MHz (SAMPLING 1600) which saves 20% of disk space and lots of CPU/GPU cycles. These 1.6MHz files can't be played with Perseus.exe, but they can be played with 3rd party SDRs.

When desired bandwidth has been defined, 80% of it is "alias-free" ie. free from artifacts. The area outside of it can be tuned, but there may be also some "trash signals". For example if you have defined SAMPLING 1600, your alias-free bandwidth is 1280kHz. If you use center frequency 1105kHz, the alias-free band covers 465khz - 1745kHz.

So if you want to record both LW and MW, you must use SAMPLING 2000 (=> alias-free bandwidth will be 1600kHz) and center frequency (f.eg) 1005kHz and you'll get alias-free band 205kHz - 1805kHz.

Note that it is recommended to use a center frequency which does not contain any BC transmission. This is because SDRs often generate an artificial peak on that frequency. This means that you'll get a spectrum trace on that frequency even if you don't have any antenna connected.

HOW TO

Selecting 2 MHz <> 1.6 MHz bandwidth

See exact insructions in MESTOR help. Sampling rate is defined in [MESTOR] section together with the center frequency.

[MESTOR]
...
// Use sampling rate of 2 MHz, center frequency on 995 kHz
// PRO users can use SET SAMPLING 1600 which saves 20% of the disk space
SET SAMPLING 2000 CENTER 995

When you tune to SW in LIVE mode, the center frequency is automatically set 10kHz below the tuned frequency. SAMPLING rate however remains the same.