Posted by
Mike Morrow-3 on
Nov 19, 2011; 8:13pm
URL: http://elecraft.85.s1.nabble.com/US-60-Meter-Band-Changes-Approved-by-FCC-CW-Issues-tp7012018.html
I wrote:
>(3) Three emission modes (CW, RTTY, Data) are authorized in addition to the
> existing USB mode.
There's interesting detail about carrier versus center frequency in the *new*
Section 97.303:
---QUOTE---
(h) 60 m band: (1) In the 5330.5-5406.4 kHz band (60 m band), amateur stations
may transmit only on the five center frequencies specified in the table below.
In order to meet this requirement, control operators of stations transmitting
phone, data, and RTTY emissions (emission designators 2K80J3E, 2K80J2D, and
60H0J2B, respectively) may set the carrier frequency 1.5 kHz below the center
frequency as specified in the table below. For CW emissions (emission designator
150HA1A), the carrier frequency is set to the center frequency...
60M BAND FREQUENCIES (KHZ)
Carrier Center
5330.5 5332.0
5346.5 5348.0
5357.0 5358.5
5371.5 5373.0
5403.5 5405.0
---END QUOTE---
Note the *requirement*: "For CW emissions ... the carrier frequency is set to
the center frequency."
For example, switching from USB Phone on 5357.0 kHz to CW on the *same* channel,
the transmitter must transmit on 5358.5 kHz. That will produce a 1500 Hz tone
in a USB receiver set to 5357.0 kHz. It appears that now a transceiver will
need to shift not only the transmitter's carrier from 5357.0 to 5358.5 kHz,
but also receiver's effective frequency up by the amount needed to produce the
desired sidetone when tuned to a 5358.5 kHz CW signal. The wording in the new
rule seems to introduce an unfortunate and valueless complexity for CW operation.
Mike / KK5F
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