Gigahertz Solutions NFA 1000 Operating Manual page 7

Status and Frequency LEDs
The "Status" LED indicates the current mode of operation
"Red" means "instrument is being charged".
"Yellow" means "measurement in progress, NO recording".
"Green" means "measurement in progress WITH recording",
however with the switch set to "log." the "Status"-LED is switched off to extend battery life.
LEDs to indicate the applicable frequency bands:
covers individual frequencies of 50 Hz and 60 Hz with their respective lock-in rang-
es.
"100/120 Hz" 1 : This LED indicates the contribution of the second through fifth
"even" harmonics.
"150/180 Hz" 1 : This LED indicates the contribution of the third through fifth "une-
ven" harmonics.
The third harmonics will presently be found in many homes and most offices as a signifi-
cant portion of the total measurement. The frequency of the strongest source can be numerically displayed when
using "Freq".
"R < 2kHz": Means "Remainder of frequencies below 2 kHz".
This LED does not show the whole
by the LEDs on the left.
"> 2kHz": Comprises frequencies within the upper TCO-band of 2 KHz up to 1 MHz.
"x 1000"-LED
Turns red when the measurement scale increases.
1 The NFA automatically detects the mains frequency and adjusts the indication of its harmonics. With "Freq."
the actual mains frequency can be determined exactly. The LED's for 16.7 Hz, mains frequency and its harmon-
ics up to 2 kHz have a suitable lock-in range to cover mains fluctuations.
© Gigahertz Solutions GmbH
The frequency-LEDs change their colour in propor-
tion to their contribution to the total field strength.
See below for details on LED display modes.
"16.7 Hz": In use for railway lines in some Europe-
an countries. The reading also includes the 2
harmonic.
"50/60 Hz"
The strongest frequency can be numerically displayed when using "Freq" mode.
band, but only the sum of all frequencies below 2 kHz which are not covered
1 : Mains frequency. The bandwidth only
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350-027_NFA1000400-6-2_EN-von-susanne as of October 2011
nd