Vrm Operation; Using Variable Range Marker (Vrm1 / Vrm2) - JRC JMA-5312-6 Instruction Manual

4.1.4 Using Variable Range Marker (VRM1 / VRM2)

Variable range markers (VRM) are indispensable to the measurement of ranges. Operators must be
familiar with the operation of VRM beforehand.
The system is equipped with two VRM. The VRM can be operated separately from each other.
An intersection marker is displayed at the intersection point of the VRM and EBL of the same
number.
When the starting point of an EBL is offset, the center of the VRM is defined as the offset EBL
starting point.
Intersection markers shown on VRM:
: EBL1, VRM1
: EBL2, VRM2
EBL1
VRM1

VRM Operation

The range value of the current VRM1 or VRM2 on the PPI display is shown in the
VRM1/2 range (upper right of the display on page 2-3). The currently operable
VRM1 or VRM2 is highlighted in the VRM1/2 adjustment (upper right of the display
⑥/⑧ on page 2-19).
To operate VRM
Procedures 1 Press the [VRM1] or [VRM2] key.
The VRM adjustment (upper right of the display ⑥/⑧ on page 2-19) will be
highlighted, and the selected VRM becomes operable.
2 Turn the [VRM] dial.
To turn the [VRM] dial to the right, the VRM control wide, to turn the [VRM] dial to
the left, the VRM control narrow.
Cancellation 1 Press the [VRM1] or [VRM2] key again.
The selected EBL display will disappear.
4.1 Use of Navigation Tools
4-6
EBL2
VRM2
4