PathAlign-R Spectracom Corporation
2200 / 2240 / 2241 PathAlign-R Manual
18.1 GHz to 19.4 GHz and 22.0 GHz to 23.5 GHz. The Transmit/Receive frequency range, in all
four bands, is manually selected via the five front panel thumbwheel switches. Frequencies in all
four bands are transmitted/received through the four 50Ω female Super SMA sparkplug
connectors [3.5 mm] compatible].
3.4.2 Band Resolution
Resolution is defined as the value represented by the least significant digit (LSD) displayed on
the thumbwheel settings. The Frequency resolution for all 4 bands is 1 MHz.
3.4.3 Dynamic Range
3.4.3.1 Transmitter
The transmitter section (signal source) of the PathAlign-R is a synthesized signal source that
provides the accuracy and stability found in signal sources of this type. The output of all four
band ranges is fixed at 0 dBm (1 mW) which provides for a known signal level for the second
(receiving) PathAlign-R to measure against. The PathAlign-R’s very stable low level signal
greatly reduces the possibility that the path alignment process will interfere with nearby active
sites.
3.4.3.2 Receiver
The receiver section of the PathAlign-R is a broad-band receiver followed by a very narrow-
band tuned filter section. The broad-band receiver provides the necessary tuning range required
of each band. The filter section allows for high sensitivity of the selected receive signal (-100
dBm, nom./1.5-2.5 GHz; -95 dBm nom./ 3.5-12.0 GHz; -90 dBm nom./ 18.1-23.5 GHz) while
attenuating nearby frequencies/noise due to its narrow bandwidth (~ 100kHz, nom.).
3.4.4 Overload Characteristics
The overload point on the PathAlign-R is -30 dBm. Signals received that are less 30 dB path
loss (0 dB to -30 dB) will read 30 dB on meter, regardless of level (i.e., the path loss needs to be
more than 30 dB for the 2240 to read correctly).
Caution: Damage may be sustained by the PathAlign-R if greater than +10 dBm is
applied to the front panel SMA connectors.
3.5 Instrument Operating Procedures
Caution: This instrument is not waterproof. To minimize weather related problems, keep
instrument within its Weather-resistant Backpack.
Prior to operation, establish that the PathAlign-R’s battery is installed and fully charged (refer to
Section 2 for battery charging instructions).
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