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Mode
Digits Announced
"E"
One measurement taken: 10s KHz, 1s KHz, "R", 100s Hz
"L"
One measurement taken: 100s MHz, 10s MHz; 1s MHz, "R",
100s KHz, 10s KHz, 1s KHz, "R", 100s Hz, 10s Hz, 1s Hz
"F"
One measurement taken: 1s KHz, "R", 100s Hz, 10s Hz, 1s Hz
"ER"
Like "E" above, but repeats measurements forever.
"LR"
Like "L" above, but repeats measurements forever.
"FR"
Like "F" above, but repeats measurements forever.
Table 1-1 Counter Announcement Frequency Measurement Modes
Pressing and holding the program switch will cycle through all six counter modes at high announcement
speed, then through all six at a low announcement speed. Continue to press the program button and the
counter will cycle forever through all six announcement modes, switching announcement speed every
time it gets through all six announcements.
When the program button is release during a given mode, the measured frequency will be announced
after a 1 second count delay. The counter now remembers that mode as the default as long as the power
is left on to the counter.
Notice that "R" (a cw short hand for ".") is used as a separator to break up the MHz, KHz, and Hz digit
groups.
Any frequency announcement can be interrupted by pressing the program button until a "K" is heard.
This is particularly useful for stopping a repeating mode (ER, LR, and FR) or a long "L" type frequency
announcement.
Counter Usage
The different modes were designed for different reasons. The "E" mode especially short and was
intended to be used to read out the frequency of a direct conversion receiver (such as the NC2030). As
such, only 100 Hz resolution was desired, and knowledge of the frequency to 99.9 KHz is good enough.
The "L" mode (think "long") was designed for general bench counter use and gives the complete
frequency down to 1 Hz. Leading zeros in the 100s and 10s of MHz digits are skipped.
The "F" mode (think "filter") was intended to aid in crystal matching for crystal filters in homebrew
receivers. When crystal matching, the most significant digits don't change. To save time, only the least
significant 4 digits (1s KHz through 1s Hz) are announced.
The repeat modes "ER", "LR", and "FR" were primarily intended to allow the monitoring of frequency
drift of a VFO over time. I once used this mode for two weeks non-stop as I tweaked the temperature
compensation of a VFO I was building. This is my family's favorite mode. ☺
Norcal NC2030 v5
12-18-05
Page 123 of 128
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