Microbit RRC-1258 MkII(s) Manual de usuario descargar pdf (Pagina 93)

USER MANUAL

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RRC-1258 MKII

Ba1258B_RemoteRig_MkIIs-A33.docx

User manual

Rev. A33 – 2015 Jan 28

93 of 236

CW-Keyer

General

The RRC-1258 has a CW-keyer function that makes CW operation possible over Internet even

if there are long latencies and lots of jitter. Note that the CW-keyer is by default disabled.

The CW-keyer side-tone is generated locally at the control RRC. When the dot or dash is

executed the audio from the radio can be muted at the Control-RRC to disable the radio side-

tone or annoying clicks and sounds. The time the mute function is active is defined by the lf-

delay setting. The value of lf-delay depends on the latency of Internet. A good start value is

the same value as the ping time between control and radio QTH.

Another unique feature is a kind of adjustable jitter buffer at the radio end. If the Internet

connection has varying latencies, you can set a key-delay before the keying of the radio is

executed. This delay makes it possible to reconstruct the transmission on-the-fly and the

system will be much more tolerant against varying latencies (jitter). Longer key-delays give

higher tolerance against jitter but also add delay until the keying is executed at the radio.

Even if you have a good connection you could try with a low value. Remember that when you

increase this value you must also increase the lf-delay value.

Settings

Keyer settings:

Control

Radio

Enable

Yes

Iambic

Mode-A

Paddle reverse

Weight [25-40]

Side tone hz [500-1500]

800

Side tone –dB [50-0]

Lf delay [0-500]

Key delay [0-250]

IO settings:

Control

Radio

IN0 mode

I/O

USB DTR as CW

OUT0 mode

I/O

OUT1 mode

I/O

OUT2 mode

Keyer

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Microbit RRC-1258 MkII(s) Manual de usuario Pagina 93

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Microbit RRC-1258 MkII(s) Manual de usuario Pagina 93

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