Buyers arrive with a model number already in mind. The decision that settles more, earlier, is whether the radio is carried or installed: it changes where the antenna sits, what supplies the power, and whether the radio is still in the conversation once the operator walks away.

What this note does not do

This note explains how the decision is made. It does not quote a coverage figure for your site, because the site does not hold one it can evidence. Anything shown as unconfirmed on the catalogue pages is unconfirmed here too.

Confirm the position with your regulator, your site authority or your freight forwarder before you commit to an order.

How to use this note

  1. Split the shift into standing posts and driving posts. That split sets the ratio; the budget does not.
  2. Count the people who leave the vehicle during a shift. Those are handheld posts even if the same person also drives.
  3. Settle where an antenna can be mounted before settling a model, because a mounted antenna is a site decision rather than a radio decision.

The two questions that decide it

The first question is whether the person is in the vehicle for the length of the conversation. A driver who talks while driving is a vehicle post. A guard who patrols on foot and returns between rounds is a handheld post that happens to have a vehicle.

The second is who owns the radio at the end of a shift. A mounted unit is signed out with the keys and stays behind when the driver changes. A handheld goes with the person. That decides the quantity: three shifts of mounted units need one per vehicle, not one per operator.

What the records hold

Two handhelds and two vehicle units, as this catalogue records them
IdentifierFrequency bandChannel capacityIngress protection
DP1400VHF/UHF; Analog + DMR16IP54
DP4801eVHF 136-174; UHF 403-527; 800 MHz on selected models; Analog + DMR1000IP68
DM3601VHF 136-174; UHF 403-470/450-527 MHz; Analog + DMR1000IP54
DM4600VHF 136-174; UHF 403-470/450-527; 300 MHz on selected models; Analog + DMR1000IP54 (mobile radio body)
Read from the catalogue at build time. A field the source document does not confirm is shown as unconfirmed rather than omitted.

Read the ingress figure per identifier, not per family. Of the four above, one records IP68 and three record IP54. The difference is a statement about where the unit is expected to live, not a marketing tier.

Where a handheld stops being the right answer

A handheld carries everything it needs: its own battery, an antenna the length of the unit, a speaker small enough for a belt. All three are compromises forced by being carried. The antenna sits at belt height, beside a metal body rather than above it.

The pack is the other limit. How much of a shift is spent transmitting decides whether one pack is enough. That is a battery question before it is a radio question.

Where a mounted unit is the wrong answer

A mounted unit stops being a radio the moment the operator leaves the cab. In a yard, a tunnel or a stairwell it is a fixed point the shift walks away from. If most of the shift is on foot, the fault is in the selection rather than the installation.

The awkward case is the mixed post: a supervisor who drives between buildings and walks through each. Neither form factor covers the whole shift, so that post usually carries a handheld while the vehicle carries a mounted unit for the driving legs.

The split, side by side

What changes with the form factor
FieldHandheldVehicle-mounted
Carried bythe personthe vehicle
Powered byits own packthe vehicle supply
Antennaon the unitinstalled on the vehicle, fed by cable
Available on footyesno
Replaced when staff changethe unit is reissuednothing changes
Fails whenthe pack is flatthe vehicle is switched off or away

Mixed fleets: what to settle first

A mixed fleet is not two fleets, provided one decision is taken early: both form factors are programmed to the same channel plan. The plan decides who hears whom. Two units of the same model on different plans behave as two radios, not one.

Installation is the second. A mounted unit needs a mounting position, a supply feed and an antenna route, none of which the radio decides. Ordered without them, it sits in its carton.

What to settle before the split is fixed

  • Which posts are driving posts, counted by shift rather than by headcount.
  • How many vehicles are in service on the busiest shift, because a mounted unit is bought per vehicle.
  • Where the antenna can be mounted on each vehicle type, and who does that work.
  • Whether both form factors run one channel plan, and who holds the file.
  • How many spare packs per handheld, and how they are rotated.
  • How many spare units, remembering that a failed mounted unit takes a vehicle out of service while a failed handheld takes a person out.

What to put in the first message

Every one of these removes a round trip. The enquiry page composes a brief containing them; you send it from your own mail or messaging app.

  • Destination country — this decides the approved variant and the marking.
  • The frequency range you are licensed to use, in MHz.
  • Quantity per site, and whether spares are included in that number.
  • Operating environment, if it is classified (hazardous area, mine, tunnel).
  • Whether the units must arrive programmed, and if so the channel plan.
  • How many of the units are vehicle-mounted, and how many vehicles that covers.

Questions this note answers

More on this topic

Other notes written against the same decision — Selection basics.

Handheld radios

Every handset in the catalogue, with the recorded parameters.

VHF or UHF

The band decision that sits underneath the form factor.

Buyer notes are written from the catalogue and the published reference pages. They carry no parameter the site cannot evidence, and an unconfirmed value stays unconfirmed here too. BaltiGo is a trading and distribution company supplying Motorola two-way radio hardware into markets worldwide, and does not claim to be a Motorola authorised dealer or official distributor.

Enquiry

Send the configuration, not just the model name

Band, destination and quantity decide whether a quotation is usable in one round or three. Compose the brief and it carries all three.

Compose an enquiry