cleaning up and properly typesetting emdashes

5 files changed, 16 insertions, 9 deletions

diff --git a/diagrams/chassis-dimensional-requirements.typ b/diagrams/chassis-dimensional-requirements.typ
index 9168a7d..aa659c2 100644
--- a/diagrams/chassis-dimensional-requirements.typ
+++ b/diagrams/chassis-dimensional-requirements.typ
@@ -372,7 +372,7 @@
     content((x-rail-center, y-rail-center + 1.85), text(
       size: 7pt,
       fill: luma(90),
-    )[(Cross-section of guide rail channel - scale enlarged)])
+    )[(Cross-section of guide rail channel -- scale enlarged)])
 
     // Main Chassis Guide Channel (U-shaped metal guide track)
     line(
diff --git a/introduction.typ b/introduction.typ
index 3fb9616..1542f8e 100644
--- a/introduction.typ
+++ b/introduction.typ
@@ -34,7 +34,7 @@ computer for real-time computation by Helmut Hölzer, to calculate V-2 rocket
 trajectories. In 1950, Gilbert D. McCann, Charles H. Wilts, and Bart Locanthi
 developed the "Direct Analogy Electric Analog Compute" ("the largest and most
 impressive general-purpose analyzer facility for the solution of field
-problems" - James S. Small, "The Analogue Alternative: The Electronic Analogue
+problems" -- James S. Small, "The Analogue Alternative: The Electronic Analogue
 Computer in Britain and the USA, 1930-1975" Routledge in 2001).
 
 In 1960, the first educational electronic analog computer, the Heathkit EC-1,
diff --git a/mechanical-specifications.typ b/mechanical-specifications.typ
index 6e53a87..20d53a3 100644
--- a/mechanical-specifications.typ
+++ b/mechanical-specifications.typ
@@ -183,7 +183,7 @@ Since the DB-25 is panel-mounted with solder cups and controls are on the front
 panel, the PCB layout must optimize cable routing to minimize noise pickup and
 maximize air flow.
 
-/ Zone A (Rear - Power):
+/ Zone A (Rear - power):
   / Function: Connection to the rear DB-25 backplane connector.
   / Location: Rear $qty(20, "mm")$ of the PCB.
   / Connector Type: Pluggable terminal block (e.g., Phoenix Contact
diff --git a/module-design.typ b/module-design.typ
index 54fba92..171f707 100644
--- a/module-design.typ
+++ b/module-design.typ
@@ -815,8 +815,8 @@ Precision of $qty(10, "ppm")$ means the maximum acceptable error is:
 
 $ epsilon_"max" = qty(20, "V") times num("10e-6") = qty(200, "uV") $
 
-This is our total error budget. Every error source - noise, drift, offset,
-nonlinearity - must sum to less than $qty(200, "uV")$ referred to output
+This is our total error budget. Every error source (noise, drift, offset,
+nonlinearity) must sum to less than $qty(200, "uV")$ referred to output
 ($upright("RTO")$), or equivalently, $qty(10, "ppm")$ referred to full scale
 ($upright("FS")$)
 
@@ -843,9 +843,9 @@ $
 
 This appears to conflict with our $qty(200, "uV")$ precision requirement. The
 resolution is that _precision_ and _noise_ are different specifications:
-/ Precision: Applies to the _mean_ of the signal - systematic errors, offset,
-  gain error, linearity.
-/ Noise: Applies to the _variance_ - random fluctuations around the mean.
+/ Precision: Applies to the _mean_ of the signal (systematic errors, offset,
+  gain error, linearity).
+/ Noise: Applies to the _variance_: random fluctuations around the mean.
 
 A measurement averaged over sufficient time can achieve precision better than
 the instantaneous noise floor. However, for real-time computation (DC to
@@ -2047,6 +2047,13 @@ dynamic and independent. Mitigation requires strict structural and layout rule:
 - Requiring star grounding for power return lines to keep $Z_"shared" arrow 0$
   per @grounding-rules.
 
+==== Drift sources <drift-sources>
+
+Drift sources contribute to the systematic error budget over time. Unlike noise,
+drift is deterministic: it has identifiable physical causes and can be
+compensated through appropriate topologies. Drift determines the useful
+computation duration before recalibration is required.
+
 == Error compensation strategies <error-compensation-strategies>
 
 == Advanced compensation topologies <advanced-compensation-topologies>
diff --git a/tables/chassis-front-panel-elements.typ b/tables/chassis-front-panel-elements.typ
index cbd9407..a5f15f7 100644
--- a/tables/chassis-front-panel-elements.typ
+++ b/tables/chassis-front-panel-elements.typ
@@ -21,7 +21,7 @@
     [AGND jack], [4mm banana, black], [Analog ground reference],
     [Dual $qty(10, "MHz")$ sine oscillator output jacks $plus.minus qty(1, "V")$],
     [4mm banana, light blue],
-    [Master oscillator output (independent paths, to allow verification - see @the-time-invariant)],
+    [Master oscillator output (independent paths, to allow verification -- see @the-time-invariant)],
 
     [$qty(10, "MHz")$ sine oscillator input jack], [4mm banana, white], [Master oscillator input],