S
CANNER EQUIPMENT
EQUIPMENT AND ACCESSORIES FOR YOUR MONITORING POST
Bob Parnass, AJ9S
parnass@megsinet.net
www.megsinet.com/parnass
Radio Shack PRO-2067 Mobile Trunk-Tracking Scanner
T
he portable PRO-92 (see January 2000
MT) is built for Radio Shack by GRE and
is capable of monitoring conventional,
Motorola trunked (type I, II, and hybrid),
Ericsson EDACS trunked, and LTR trunked systems. The PRO-92 was the first portable alternative to the Uniden-manufactured trunk trackers and hobbyists had high hopes for the new
contender.
The PRO-2067 is a newer, mobile version
of the PRO-92 and employs a different method
of tracking Motorola trunked systems as well as
a robust audio amplifier.
Both models tune the upper portion of the 10
meter ham band and the standard “scanner bands,”
as well as the 806 - 960 MHz range. They also
function as a “weather alert radio,” displaying
SAME messages, but neither supports programming of location codes for local weather alerts.
tinuous tone coded squelch) and Digital Private
Line (digital coded squelch). The PRO-2067 can
detect and display a PL or DPL code on a signal
almost instantaneously.
Each channel may be easily programmed
with a 12 character label which is displayed
along with the frequency. Each memory bank
may have its own text label, but bank labels are
not displayed while trunking or on channels assigned a PL or DPL code.
A built in attenuator may be enabled on a
per-channel basis, though we didn’t need to use
it. Some PRO-2067 users find the attenuator
helpful in preventing desensitization from strong
VHF-high band signals when their radio is connected to an outdoor base station antenna.
❖ Mobile Package
The PRO-2067 is billed as a mobile scanner and includes a DC power cord and simple
mobile mounting bracket. If you wish to use
the PRO-2067 as a desktop unit, you’ll need
to purchase a 12 VDC 500 mA power supply
and, ironically, we use a Uniden wall wart designed for the BC-9000XLT.
The PRO-2067 lacks rubber feet on the bottom of the cabinet to prevent table top scratches.
We use an external speaker for better indoor listening because the underside speaker is situated
for mobile application.
You can program the PRO-2067 with a computer (interface kit not supplied) or clone one
PRO-2067 from another PRO-2067 or PRO-92
using the cable provided.
The keypad is not backlit, which is disappointing for a mobile model. The LCD display
is well lit, but too small and busy to be read
easily when the PRO-2067 is mounted below
the dashboard.
❖ Memory
The PRO-2067 and PRO-92 use the same
memory organization – 500 memory channels
distributed among 10 banks, numbered 0 - 9.
Each memory channel is programmed with
a frequency and what Radio Shack calls a
“mode.” The modes are AM, FM, Motorola
Trunked, EDACS, LTR, PL, and DL (digital PL).
You can mix combinations of conventional and
LTR trunked frequencies within the same bank,
but frequencies for each EDACS and Motorola
trunked system must be programmed into their
own separate bank.
PL and DPL are abbreviations derived from
Motorola’s trademarked terms Private Line (con100
MONITORING TIMES
The PRO-2067 provides a search with 10
pairs of frequency limits and you can search
multiple ranges sequentially. The 10 ranges are
preprogrammed, but their limits and text labels
can be reprogrammed via the proper keystroke
sequence. Up to 50 frequencies may be locked
out in each bank. There is no auto store feature.
❖ Multi Line Display
Both the PRO-2067 and PRO-92 employ a
4 line, dot matrix liquid crystal display, and the
PRO-2067 display is brightly lit at all times. One
may adjust the contrast through a keypad sequence.
The display shows frequencies, channel,
mode, and other indicators. When the PRO-2067
is stopped on a signal, the first line shows the
channel number and other status information.
For trunked channels, the remaining 3 lines
show frequency, channel label, and talk group
label.
❖ Subtleties
❖ Scanning and Searching
As you might expect, memory banks can be
sequentially scanned in any combination. We
programmed 2 banks with conventional AM and
FM frequencies, 3 banks with different Motorola
trunked systems, 2 banks with an EDACS
trunked system, and 2 banks with a local LTR
trunked business system.
Our PRO-2067 scans all those banks in turn.
There is no apparent delay when our PRO-2067
switches among conventional and trunked banks.
For trunking, one can program up to 100 talk
group IDs in each of the 10 banks. The only
way to program a talk group is to press the Trunk
key while the PRO-2067 is listening to a signal
on that trunk group. This inconvenience means
you must wait around until someone actually
uses the talk group, then press the Trunk key
quickly, before the transmission ends.
You can lock out talk groups from the lists
and conversations in these groups won’t be
scanned. Talk groups cannot be locked out while
searching (i.e., scanning in the Open mode), a
drawback when searching a trunked system in
which one or more talk groups is dedicated to
telemetry or other data.
While scanning trunked systems, you can
instruct the PRO-2067 to hold on a particular
talk group. It will scan all the trunked frequencies in the current bank, stopping only on conversations in that talk group.
September 2000
The PRO-2067 and PRO-92 are complex radios and some aspects of the way they work are
not be obvious after a quick reading of the
owner’s manual. Owners of both models share
operating hints at the www.pro-92.com web site.
You must program EDACS frequencies in
the proper order, in a separate bank, starting with
the second memory channel (01) in that bank. If
you start programming them at the first channel
(00), the radio won’t track them properly.
Some features, e.g., the 2 second rescan delay, are implemented for conventional systems and
don’t function while the PRO-92 is monitoring
trunked activity. Bank text labels are not displayed
for trunked frequencies. The 4th line on the display shows talk group information instead.
As in the PRO-92, the PRO-2067’s PL and
DPL squelch are only effective while scanning
in the Closed mode. We could find no way to
configure either radio to sit on a single channel
with PL or DPL, and prevent signals without
the proper code from opening the squelch.
The Uniden Trunk Trackers support multiple
talk group lists per bank vs. one list per bank in
the GRE-made competitors. To obtain similar
functionality in the PRO-2067, you could program the same trunked system frequencies into
several channel banks, and program the corresponding talk group lists differently, e.g., one
for police, another for fire, etc.
❖ Performance
Our PRO-2067 (s/n 00315) produces clean,
crisp audio and the 1.9 watts is more than ad-
less
sensitive
less
sensitive
PRO-2067 VHF NFM SENSITIVITY
12 dB SINAD, 3 KHZ DEVIATION, Serial #003315
PRO-2067 UHF NFM SENSITIVITY
12 dB SINAD, 3 KHZ DEVIATION, Serial 003315
0.8
0.7
1.0
0.6
0.8
0.4
uV
uV
0.5
0.6
0.3
0.4
0.2
0.2
0.1
0.0
25
35
45
more
sensitive
145
155
FREQUENCY (MHZ)
Measurements
Radio Shack PRO-2067 Scanner S/N
003315
List price: $349.99
Tandy Corp.
Fort Worth, TX 76102
Frequency coverage (MHz):
29 - 54 (5, 10, 15, 20, 25, 30, 50, 100 kHz steps)
108 - 136.9875 (12.5, 25, 50, 100 kHz steps)
137 - 174 (5, 10, 15, 20, 25, 30, 50, 100 kHz steps)
380 - 512 (12.5, 25, 50, 100 kHz steps)
806 - 823.9375, 851 - 868.9875, 894 - 960 (12.5,
25, 50, 100 kHz steps)
FM modulation acceptance: 12 kHz
Intermediate Frequencies:
257.5, 21.4, and 0.455 MHz
Image rejection due to 1st IF:
69 dB at 155 MHz
69 dB at 224 MHz
66 dB at 460 MHz
165
175
0.0
380 400 420 440 460 480 500
more
sensitive
820 840 860 880 900 920 940 960
FREQUENCY (MHZ)
equate when using an external speaker. It is sensitive and has excellent image rejection.
The PRO-92 and PRO-2067 differ in the way
they track Motorola trunked systems. The original PRO-92 monitors the subaudible data transmitted “under” voice traffic. It sometimes displays the wrong talk group ID as a consequence,
a behavior which has come to be known as
“wobble.” In contrast, the PRO-2067 implementation uses data transmitted on the control channel, the method used by Uniden.
Our PRO-2067 doesn’t have an ID wobble
problem, but has a different bug. It sometimes
fails to display a talk group label while paused
on a transmission in a Motorola trunked system
in Open mode. The proper label appears as soon
as we press the Manual key.
The PRO-92 we reviewed last January works
well tracking the small to medium size trunked
systems in our locale, but some PRO-92 users
in other areas report problems tracking larger
and busier systems (March 2000 MT). While the
PRO-92 tracks our local systems well, the PRO2067 tracks them better. It follows conversations
when held on a chosen talk group and misses
fewer call backs in the EDACS systems. The 23
channel/sec. scan speed is acceptable, though
slower than Uniden models. We don’t know how
well the PRO-2067 performs monitoring large,
heavily loaded, analog trunked systems because
there aren’t any nearby.
❖ Overall
The PRO-2067 packs a lot of capability into
a small package and we are impressed with its
performance. The instantaneous PL/DPL code
display is fantastic, though the PL and DPL
squelch should be designed to function while in
manual mode. The alpha channel labeling – a
“must have” for scanners with several hundred
channels – is easily programmed.
Listeners who concentrate more heavily on
trunked systems would appreciate the ability to
lock out talk groups while searching and may
find the PRO-2067’s monolithic talk group lists
too restrictive.
————————————
The Pro-2067 is available from Grove Enterprises for $339.95 (800-438-8155 to order)
A ttenuator:
20 dB @ 40 MHz
20 dB @ 155 MHz
15 dB @ 460 MHz
11 dB @ 860 MHz
A udio output power, measured at ext. speaker jack:
1.9 W into 8 ohms @ 10% distortion
Squelch tail near threshhold:
(1 uV @ 155 MHz): 4 ms.
Practical memory scan speed:
23 channels/sec.
September 2000
MONITORING TIMES
101