Product Review
Connect Systems, Inc.
CS-800D
DMR / Analog
Dual Band Mobile
MotoTRBO
Tier II compatible
John 'Miklor'
K3NXU
Nate WN3I
The Review
This is a combined review of two new CS-800D radios received as part of an early
shipment.
My friend Nate (WN3I) received his last week and we spent the last few days comparing notes.
CS-800D
A true Dual Band DMR Tier II mobile. The code plug is in, and the radio is mounted, so let's take a look at the new
addition to the DMR line up.
In the Box
- The CS-800D Main Body
- The Remote Head
- Manual
- 2 Programming Cables
- Mounting bracket
- Misc Mounting Hardware
- 16 Button Microphone
- Microphone Bracket
General Description
- VHF: 136-174 MHz UHF: 400-470 MHz
- DMR Tier II
- FM capable
- 25W / 50W transmit
- 4000 channels
- 130,000 User Dtatbase
- Size: 1.8 x 6.3 x 6.9" (46 x 160 x 175mm)
- Weight: 2.9 lbs (1315g)
- FCC Part 90 (Aug 2019)
Enclosure
The CS-800D weighs in at nearly 3 lbs. Shown here is the bottom view of
the radio. Although the mounting bracket was in place when I took this picture, you can still get a good look at the size of the heat sink. The radio is
terminated with a UHF Type-N connector.
The front panel is detachable which allows for the radio to be mounted under the
seat, overhead or in back of the vehicle.
Transmitter
The frequency range is 136-174 MHz and 400-470 MHz. Along with Tier II DMR, the radio
also supports both Wide and Narrowband FM. As for the transmitter power, it was
pretty close to where it is rated. Power level checks were verified using a calibrated
VHF/UHF Bird Termaline.
On pleasant observation was the current drain on transmit. I found the 50w
analog mode draws the expected 10A, and DMR draws 4A.
CS-800D |
446 MHz |
146 MHz |
High |
45W |
48W |
Medium |
31W |
25W |
Low |
6W |
5W |
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Receiver
The receiver sensitivity is excellent, and
the audio quality is loud, clear and undistorted. There is no squelch tail on
DMR, but the
Clear Channel indicator
emits a tone that lets you know when the channel is clear. The receive audio
provides quality sound throughout the entire vehicle. The volume control is
digital so changing the audio level may take 2 or 3 turns of the dial providing
smooth level changes.
Note:
One of the radios tested experienced receive issues when receiving VHF. It
appeared to randomly drop in sensitivity, being susceptible to frontend overload
My suspicion is that it was being caused by another nearby VHF station. The
source of the overload has not been identified.
The radio reviewed was one the early releases.
Since then, there have been hardware revisions that have addressed this issue.
Removable Control Head
The CS-800D is about as easy to mount as you can get. At 1.8 x 6.3 x 6.9",
an under dash install is relatively easy.
If space is a premium, the control head can be detached and mounted elsewhere in
the vehicle. It takes a good pull to remove the front head as the tolerances are
pretty tight. No rattling around here.
No special high priced cable is required to connect the radio body to the remote
head. We ran an extension using a standard 35' length of CAT5 cable and there
was absolutely no noise or loss injected.
Heat dissipation
It was no surprise that when this radio is run on analog at high power
for long periods of time, the heat sink is going to get hot, especially if
mounted under the seat or in the trunk. . That's the
nature of any high power radio.
The heat sink
is on the bottom and is more than sufficient to handle the 50W, but you need to
meet it half way. Unless you really need every decibel of power, I would
recommend running the FM mode at mid-power (35w) and mounting it with the heat
sink on top. The radio body will run a bit
cooler. Although the radio doesn't have a cooling fan, adding one is a simple
matter and can be done with a thermal switch (KSD-01F) and a CPU fan.
In the DMR mode, the radio runs much cooler and running at full power is not an
issue.
Audio
The 800D Tx audio level is adjustable in the software and my OTA audio reports have been excellent. I set the audio gain control to 12 and talk about an inch from the microphone and the reports have all been excellent. If you like
speaking away from the microphone or speak softly, you may want to kick the
Internal Mic Gain Level up a notch or two. If this is mounted in the cab of a much larger vehicle, you can
bring it down a peg.
Antenna Connector
The radio itself is
terminated with a type N connector. If your current antenna is terminated with a
PL-259, an adapter would be needed. That would add a tiny bit of loss, but if
you use a quality adapter, not
enough to be relevant. (.3 db)
Display
The monochrome display measures 5/8 x 1 3/4 (16 x 44mm) is easy to read with excellent resolution.
I found the display is large, easy to read and not cluttered.
Programmable Keys
Each button on the front panel is capable of dual functions selectable by either
a quick key press or long press. I found plenty of flexibility with the
nearly 40 options available.
Programming and Software
The
Programming Software was downloadable from the Connect Systems
website.
Select View Amateur Radio, then Software and CS-800D.
A unique feature of the software is the Field definition. If you see a field
that you don't recognize, there is a field definition that appears at the bottom
of the page describing what the function is and how it works. This makes it
extremely easy for the first time user.
There were two positive things I noticed from the start. If the Rx contact is set to None, the software will
default to the same contact as the Tx. Also, when adding new channels, I was able to cut/paste by creating a block of
empty channels and simply cut/paste the data from one channel to another, only
needing to change the frequency of the new channels. Not all software is this
friendly, but this will save you a good bit of data entry.
Each Scan List can include up to 32 channels and be any mix of VHF, UHF, DMR and
Analog.
I posted a sample code lug for the 800D at
Miklor Code Plugs. The code plug is based on repeaters here
in southern PA, but changing the I/O frequencies should get you started in the
right direction.
Firmware
The CS-800D firmware is fully upgradable.
If upgrades are made available, they can be upgraded with a
standard Windows based PC. The latest firmware is always on the Connect Systems
website.
The latest firmware update allows for 130,000 DMR user IDs as compared to
the original 65,288. As of Sept 2020, there are nearly 190,000 DMR IDs, so the
database will need to be trimmed a bit before loading.
Programming Cable
There are two programming cables for the CS-800D. One uses a USB to DB-15
connector for firmware upgrades and general programming of the
radio. The other is a USB to RJ-45 which is used for programming the
microprocessor in the control head should additional features be added in the
future.
Conclusion
We had the opportunity to use this radio for the past few weeks and
have had all positive results. Being able to switch from the
local VHF to the UHF DMR repeater with a single press of the microphone button
can spoil you very quickly, and having the analog mode right there is another
plus.
In the Connect Systems tradition, this radio was not rushed to market. It's a
solidly built DMR radio designed around a Tier II platform. This is a true high
quality Dual Band DMR/analog radio that will not disappoint and their customer
support is second to none.
Concerns
- Cannot field program
- Does not display Zone info
FCC Part 90
As of August 2019, the CS800D received its FCC Part 90 certification.
Note: This equipment was loaned to me by a friend. This is an unbiased review.
All findings are factual based my personal experience.
CS-800D
Dual Band DMR Mobile
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